332354 + Interview Questions in Secondary School in Math

1.	If a,b,c are real and one root of ax^2 +bx+c =0 is 3+ √2 then the other toot is=?
Answer» 3-√2 is the other ROOT of GIVEN EQUATION

Discussion

2.	the sum of interior angles of a regular polygon is twice the sum of its exterior angle find the number side of polygon
Answer» 6 is the NUMBER of SIDES

Discussion

3.	What is 4+4? and 2+2?and 3-3?and 4×3?
Answer» HOLA!! HERE IS THEANSWER 4+4 =8 2+2=4 3-3=0 4×3 =12. Hope it HELPS to you.

Discussion

4.	ramesh sold an article at a profit of 10%.had it been sold for RS 75 more the profit would have been 16 %find the cost price of the article
Answer» Let the cp be X sp 1 = x + 10% of x = 110/100 x sp 2 = x + 16% of x = 116/100 x sp2 - sp1 = 75 116x/100 - 110x/100 = 75 6x/100 = 75 x = 7500/6 x = 1250 So we have cp = 1250

4.

ramesh sold an article at a profit of 10%.had it been sold for RS 75 more the profit would have been 16 %find the cost price of the article

Answer»

Let the cp be X

sp 1 = x + 10% of x = 110/100 x

sp 2 = x + 16% of x = 116/100 x

sp2 - sp1 = 75

116x/100 - 110x/100 = 75

6x/100 = 75

x = 7500/6

x = 1250

So we have cp = 1250

Discussion

5.	Find the sums given below:(1) 34+32+30+..........+10(2) -5+(-8)+(-11)+..........+(-230)
Answer» $S_n = \frac{n}{2} [T_1 + T_n] \\ \\ n = \frac{T_n - T_1}{d} + 1$ n = no. of terms d = common DIFFERENCE 1. $d = 32 - 34 = - 2$ $T_1 = 34 \\ T_n = 10$ $n = \frac{10 - 34}{- 2} + 1 \\ \\ = \frac{- 24}{- 2} + 1 \\ \\ = 12 + 1 = 13$ $S_n = \frac{13}{2} [34 + 10] \\ \\ = \frac{13}{2} \times 44 = 13 \times 22 = 286$ 2. $d = (- 8) - (- 5) = - 8 + 5 = - 3$ $T_1 = - 5 \\ T_n = - 230$ $n = \frac{(- 230) - (- 5)}{- 3} + 1 \\ \\ = \frac{- 230 + 5}{- 3} + 1 \\ \\ = \frac{- 225}{- 3} + 1 \\ \\ = 75 + 1 = 76$ $S_n = \frac{76}{2} [(- 5) + (- 230)] \\ \\ = \frac{76}{2} [- 5 - 230] \\ \\ = \frac{76}{2} \times (- 235) = 38 \times (- 235) = - 8930$ Hope these may be helpful. PLEASE MARK my answer as the brainliest if these may be helpful. Thank you. Have a nice DAY.

5.

Find the sums given below:(1) 34+32+30+..........+10(2) -5+(-8)+(-11)+..........+(-230)

Answer»

$S_n = \frac{n}{2} [T_1 + T_n] \\ \\ n = \frac{T_n - T_1}{d} + 1$

n = no. of terms

d = common DIFFERENCE

1.

$d = 32 - 34 = - 2$

$T_1 = 34 \\ T_n = 10$

$n = \frac{10 - 34}{- 2} + 1 \\ \\ = \frac{- 24}{- 2} + 1 \\ \\ = 12 + 1 = 13$

$S_n = \frac{13}{2} [34 + 10] \\ \\ = \frac{13}{2} \times 44 = 13 \times 22 = 286$

2.

$d = (- 8) - (- 5) = - 8 + 5 = - 3$

$T_1 = - 5 \\ T_n = - 230$

$n = \frac{(- 230) - (- 5)}{- 3} + 1 \\ \\ = \frac{- 230 + 5}{- 3} + 1 \\ \\ = \frac{- 225}{- 3} + 1 \\ \\ = 75 + 1 = 76$

$S_n = \frac{76}{2} [(- 5) + (- 230)] \\ \\ = \frac{76}{2} [- 5 - 230] \\ \\ = \frac{76}{2} \times (- 235) = 38 \times (- 235) = - 8930$

Hope these may be helpful.

PLEASE MARK my answer as the brainliest if these may be helpful.

Thank you. Have a nice DAY.

Discussion

6.	Bag contains 8 white and 6 red balls .the probability of drawing 2 ball of same color
Answer» 3/14. ,. . . . . . .

Discussion

7.	A window is made of a square portion and an equilateral triangle above it
Answer» GIVE me the FULL QUESTION

Discussion

8.	How to form a polynomial equation when we have the roots given
Answer» When the roots are given, say alpha and beta, the first step is to FIND the SUM and the PRODUCT of the zeros.. ie alpha + beta =?......... (i) Alpha * beta =?........... (ii) Then the next step is to form the polynomial.U simply have to substitute (i) and (ii) in the equation given below, X2 - (alpha + beta) x + alpha*beta That's it..... Hope this helps... Plz mark as brainliest..!

Discussion

9.	Consider the list of all the natural numbers multiples of 3 or 5 which are below 10
Answer» 3,5,6,9 are SONE NATURAL NUMBERS

Discussion

10.	Find divisor if dividend is 4823597, quotient is 5008,and reminder is 893
Answer» DIVIDEND =divisior×quotient +reminder 4823597=d×5008+893 4823597=d×5901 4823597÷5901 =d 817=d

Discussion

11.	Father 3 times age on his daughter, mother 2 times age on his son, mother and father difference age is 9, son and daughter difference age is 7, what is mothers age
Answer» Here is your ANSWER. MAY it will HELP you.

Discussion

12.	Hey sove itfactorise 6(x+2y) here so cube of (x+2y) + 8(x+2y) here do square of (x+2y)try to understand
Answer» HOPE this HELPS you...in some WAY

Discussion

13.	Pg number 112 of class 10 maths Q3. VIII part
Answer» Of which YEAR TEXT book and old or new. I don't have new text book so write ur QUESTION

Discussion

14.	in parallelogram ABCD t is equal to BC and AT intercept to intersects BD in M and DC in O . prove that AM square =MT×MO.
Answer» Dnnfkgkgktmckfmfncxjjcncjc

Discussion

15.	the age of rohan and rohit are in the ratio 3:7.five year from now the ratio of their ages will be 2:3find their present qge
Answer» 8 : 12 will be the ANSWER

Discussion

16.	Two consecutive even integers are ___________
Answer» The NUMBERS that can be WRITTEN in the FORM 2x,2x+2

Discussion

17.	Write decimal expansion of 129_2×2×5×5×5 without actual division
Answer» 3 as it is 5^3........

Discussion

18.	27×15×10×2cm square how can we solve it
Answer» HOPE this HELPS you...

Discussion

19.	A vessel can be filled by a pipe in 25 minutes and ut can be emptied by a waste pipe in 20 minutes .if both the pipes be opened when the vessel is full how soon will it be empty
Answer» PART filled by pipe A in 1 min = 1/25 Part emptied by pipe B in 1 min = 1/20 Vessel will be empty in = 1/25 - 1/20 = 4-5/100 = -1/100 ( - SIGN INDICATES that vessel will be drained fast than getting filled) So it will get empty in 100 MINS = 1 hour 40 mins completely

19.

A vessel can be filled by a pipe in 25 minutes and ut can be emptied by a waste pipe in 20 minutes .if both the pipes be opened when the vessel is full how soon will it be empty

Answer»

PART filled by pipe A in 1 min = 1/25

Part emptied by pipe B in 1 min = 1/20

Vessel will be empty in = 1/25 - 1/20 = 4-5/100 = -1/100 ( - SIGN INDICATES that vessel will be drained fast than getting filled)

So it will get empty in 100 MINS = 1 hour 40 mins completely

Discussion

20.	Average age of 6 sons of a family is 8 years.the average age of sons together with their parents is 22 yrs. if the father is older than the mother by 8 years, the age of mother is
Answer» PLS MARK IT AS BRAINLIEST ANSWER. AND DROP A ♥.

Discussion

21.	Average cost of 8 pens and 5 pencils is rs 25. while the average cost of 4 pens and 7 pencils is rs 21. what is the total cost of 18 pens and 18 pencils?
Answer» Let The cost of 1 pen be x and cost of 1 pencil be Y. So, $\frac{8x + 5y}{13} = 25 \\ 8x + 5y = 325..............(1)$ And Now, $\frac{4x + 7y}{11} = 21 \\ 4x + 7y = 231..............(2)$ Equalising (1) & (2) 8x+5y = 325 -------(3) 4x+5y = 231 --------(4) ------------------------------------- By SUBTRACTING (4) from (3) ------------------------------------- 8x+5y-(4x+5y) = 325-231 8x+5y-4x-5y = 94 (8-4)x = 94 4x = 94 X = 23.5 Cost of 1 Pen = ₹ 23.5 Putting the VALUE of x in EQUATION (1) We have, $8 \times (23.5) + 5y = 325 \\ 188.0 + 5y = 325 \\ 5y = 325 - 188 \\ 5y = 137 \\ y = \frac{137}{5} \\ y = 27.4$ Value of 1 pencil is ₹ 27.4. PLS MARK IT AS A BRAINLIEST ANSWER. AND DROP A ♥.

Discussion

22.	A train traveling at 60 kmph takes 27 seconds in passing a certain point. find the length of the train
Answer» 60kmph ⇒ 1 hour = 60 km Find the distance in metre: 1 hour = 60 km 1 hour = 60,000 m Find the distance traveled in 1 min: 60 min = 60,000 m 1 min = 1,000 m Find the distance traveled in 1 second: 60 sec = 1000m 1 sec = 1000/6 = 50/3 m Find the distance traveled in 27 seconds: 1 sec = 50/3 m 27 sec = 50/3 x 27 = 450 m Answer: The LENGTH of the train is 450 m

22.

A train traveling at 60 kmph takes 27 seconds in passing a certain point. find the length of the train

Answer»

60kmph

⇒ 1 hour = 60 km

Find the distance in metre:

1 hour = 60 km

1 hour = 60,000 m

Find the distance traveled in 1 min:

60 min = 60,000 m

1 min = 1,000 m

Find the distance traveled in 1 second:

60 sec = 1000m

1 sec = 1000/6 = 50/3 m

Find the distance traveled in 27 seconds:

1 sec = 50/3 m

27 sec = 50/3 x 27 = 450 m

Answer: The LENGTH of the train is 450 m

Discussion

23.	A triangle has two sides of length 8 and 10 what value would the length of the third side be
Answer» If the triangle is right ANGLED triangle and Base and PERPENDICULAR is 8 and 10 then the HYPOTENUSE = $\sqrt{264}$ or it is any other triangle then SIDE will be less than 8+10 ie18

Discussion

24.	you are given an arithmetic expression which contains only (+ - * /) operators. precision of (* /) is greater than precision of(+ -). you have to evaluate the expression if 2 consecutive same priority operator occur evaluate them from left to right.
Answer» No two signs have the same priority. The order of precision follows the BODMAS RULE acc to which, Bracket > Of > Division > Multiplication > Addition > Subtraction. Now as per your QUERY to EVALUATE the expression if 2 consecutive same priority operator occur, then they can be simplified togetherly. eg: 4 X 12 / 6 + 2 - 3 - 1 or, 4 x 2 + 2 - 3 - 1 or, 8 + 2 - 3 - 1 or, 10 - 3 - 1 or, 6 (Ans) if your objective is SOMETHING different from this then please let us know. Better to mention the question example.

24.

you are given an arithmetic expression which contains only (+ - * /) operators. precision of (* /) is greater than precision of(+ -). you have to evaluate the expression if 2 consecutive same priority operator occur evaluate them from left to right.

Answer»

No two signs have the same priority.

The order of precision follows the BODMAS RULE acc to which,

Bracket > Of > Division > Multiplication > Addition > Subtraction.

Now as per your QUERY to EVALUATE the expression if 2 consecutive same priority operator occur, then they can be simplified togetherly.

eg: 4 X 12 / 6 + 2 - 3 - 1

or, 4 x 2 + 2 - 3 - 1

or, 8 + 2 - 3 - 1

or, 10 - 3 - 1

or, 6 (Ans)

if your objective is SOMETHING different from this then please let us know. Better to mention the question example.

Discussion

25.	How many seconds are there in ayear 365days?express the answer in standard notation
Answer» Answer: Step-by-step explanation: year = 365 days 1 day = 24 hours 365 days = hours 1 HOUR = 60 minutes 8760 hour = minutes 1 MINUTE = 60 seconds 525600 60 seconds=31536000second In scientific notation=3.153610^10

25.

How many seconds are there in ayear 365days?express the answer in standard notation

Answer»

Answer:

Step-by-step explanation:

year = 365 days

1 day = 24 hours

365 days = hours

1 HOUR = 60 minutes

8760 hour = minutes

1 MINUTE = 60 seconds

525600 *60 seconds=31536000second

In scientific notation=3.1536*10^10

Discussion

26.	Express 84 as the sum of two prime numbers.write all such possible pairs of prime numbers
Answer» 11+73 , 79+5, 67+17, 61+ 23, 53+31, 47+37,

Discussion

27.	The cost of 15 notebooks is RS 144.find the cost of one such notebooks
Answer» The COST of ONE NOTEBOOK = RS 9.6

Discussion

28.	What is the rote of 100952
Answer» The ROOT of this EQUATION is 317.719

Discussion

29.	In a quadrilateral angle angle b is 90° = angle d. prove that 2 Ac^2-bc^2=ab^2+ bc^2+ cd^2+ad^2
Answer» HOPE it's HELP you!!!!

Discussion

30.	Find zeros and verify the relationship between 2 x square - 5x- 3
Answer» 2X^2 - 5X + 3 = 2x^2 - 2x - 3x + 3 = 2x ( X - 1) - 3(x - 1) = (2x - 3) (x - 1) Zeroes are 3/2 and 1 Now, Sum of zeroes = - b/a => 3/2 + 1 = - (-5/2) => ( 3+ 2)/2 = 5 /2 => 5 /2 = 5/2 LHS = RHS Product of zeroes = c/a => 3/2 × 1 = 3/2 => 3/2 = 3/2 LHS = RHS Hence verified..

Discussion

31.	Please solve question 10 a and b part
Answer» Where is the QUESTION

Discussion

32.	2025 plants are to be planted in a garden in such a way that each row contains as many plants as the no. of rows .find the no. of rows and a no. plants in each row
Answer» No of rows = no of plants let no of plants and no of rows = X ATQ X × X = 2025 X² = 2025 X= √2025 X= 45 So 45 plants should be PLANTED in each row. Hope it helps Brainliest PLS

Discussion

33.	A thief steals a car at 2:30pm and drives at 60km/h.the theft is discovered at 3pm and the owner sets off in another car at 75km/h.when will he overtake the thief?
Answer» As the theft was discovered exactly after half an hour and speed of thief's CAR is 60 kmph so when the owner sets off the thief WOULD be at 30 km We have distance = 30 km Now both cars moving in same DIRECTION so the speeds will get subtracted = 75 - 60 = 15 kmph we have speed 15kmph, distance 30 km time = distance / speed = 30/15 = 2 hours Owner will reach thief exactly after 2 hours

33.

A thief steals a car at 2:30pm and drives at 60km/h.the theft is discovered at 3pm and the owner sets off in another car at 75km/h.when will he overtake the thief?

Answer»

As the theft was discovered exactly after half an hour and speed of thief's CAR is 60 kmph so when the owner sets off the thief WOULD be at 30 km

We have distance = 30 km

Now both cars moving in same DIRECTION so the speeds will get subtracted

= 75 - 60

= 15 kmph

we have speed 15kmph, distance 30 km

time = distance / speed = 30/15 = 2 hours

Owner will reach thief exactly after 2 hours

Discussion

34.	A tank is 3 by 5 full of water 15 more are required to fill it up
Answer» 2 = 15 1= 7.5 5 = 7.5× 5= 37.5 will be the ANSWER

Discussion

35.	A survey of 150 families each having 5 children fit a binomial distribution
Answer» RESULTS obtained in the samples do not ALWAYS AGREE exactly with the .... Example 5: A survey of 320 families with 5 CHILDREN given DIST..

Discussion

36.	Difference between quadratic inequalities and factorization
Answer» SOLUTION: what is the DIFFERENCE between factoring quadratic EQUATION and ... To SOLVE a quadratic equation, we must have an equal or an inequality sign, AND a RESULT.

Discussion

37.	Example or numbers with billion and million together
Answer» 3 003 000 000 is such a NUMBER

Discussion

38.	Example of fraction problems with solution
Answer» (1/2)+(2/11)÷1-(1/2)×(2/11)? the ANSWER is 3/4 very SIMPLE.....

Discussion

39.	Estimate by rounding to the nearest ten thousand 47539686-2474707 of th
Answer» After SUBTRACTING the ANSWER is45064979 and after ROUND off it will be 45060000. HOPE it HELPS

Discussion

40.	Find the HCF of each the following groups of number using division method
Answer» Where are the GROUPS of NUMBERS my FRIEND??

Discussion

41.	6.2x= 8.1× 8.1 - 1.9× 1.9
Answer» 6.2x=65.61-3.61 6.2x=62 x=62/6.2 x=620/62 x=10

41.

6.2x= 8.1× 8.1 - 1.9× 1.9

Answer»

6.2x=65.61-3.61

6.2x=62

x=62/6.2

x=620/62

x=10

Discussion

42.	Find x , ifPlease tell the answer fast
Answer» HOLA!! HERE IS THE ANSWER

Discussion

43.	PLS SEND IT FAST........................I WILL MARK IT AS BRAINLIESTFactorise x4+4x²-12
Answer» $x^4 + 4x^2 - 12 \\ \\ = (x^2)^2 + (2 \times x^2 \times 2) + 2^2 - 2^2 - 12 \\ \\ = (x^2 + 2)^2 - 4 - 12 \\ \\ = (x^2 + 2)^2 - (4 + 12) \\ \\ = (x^2 + 2)^2 - 16 \\ \\ = (x^2 + 2)^2 - 4^2 \\ \\ = (x^2 + 2 + 4)(x^2 + 2 - 4) \\ \\ = (x^2 + 6)(x^2 - 2)$ $\therefore x^4 + 4x^2 - 12 = (x^2 + 6)(x^2 - 2)$ HOPE this may be HELPFUL. PLEASE mark my ANSWER as the brainliest if this may be helpful. Thank you. Have a nice DAY.

43.

PLS SEND IT FAST........................I WILL MARK IT AS BRAINLIESTFactorise x4+4x²-12

Answer»

$x^4 + 4x^2 - 12 \\ \\ = (x^2)^2 + (2 \times x^2 \times 2) + 2^2 - 2^2 - 12 \\ \\ = (x^2 + 2)^2 - 4 - 12 \\ \\ = (x^2 + 2)^2 - (4 + 12) \\ \\ = (x^2 + 2)^2 - 16 \\ \\ = (x^2 + 2)^2 - 4^2 \\ \\ = (x^2 + 2 + 4)(x^2 + 2 - 4) \\ \\ = (x^2 + 6)(x^2 - 2)$

$\therefore x^4 + 4x^2 - 12 = (x^2 + 6)(x^2 - 2)$

HOPE this may be HELPFUL.

PLEASE mark my ANSWER as the brainliest if this may be helpful.

Thank you. Have a nice DAY.

Discussion

44.	Tanq+cot q=2 then the value of sinq is
Answer» Hit and TRIAL method ,put Q = 45 DEGREE in given equation, than the value is satisfied than , sin q = sin 45 ° = 1/√2 will be the ANSWER

Discussion

45.	Square + 1 upon x square is equal to 18 then find x cube + 1 upon x cube
Answer» X+1/x=18 then,x^3+1/x^3=(18)^3 {x+1/x = 18} =5832 Hope it's CORRECT & HELPS u

Discussion

46.	A stone is projected vertically find the value of f^2h/gv^2
Answer» QUESTION from Motion in a Straight LINE,jeemain,physics,class11, KINEMATICS,CH3,motion-in-a-straight-line, acceleration ... Missing: gv ‎\| ‎Must include: ‎gv

Discussion

47.	A and b working separately can do a piece of work in 20 and 15 days
Answer» They can do the PIECE of WORK TOGETHER in 5 DAYS

Discussion

48.	Plz answer me fast I will mark u as brainiest.help me out fast...
Answer» I HOPE it will HELP you

Discussion

49.	Evaluate for x 36x=78sq.-48sq.
Answer» HEY your ANS is here ______ given 36x=(78)2-(48)2 36x=(78+48)(78-48) as it is forming an identity a2-b2=(a+b)(a-b) now 36x=126×30 36x=3780 x=3780/36 x=105 _____

Discussion

50.	a student has to secure 40% marks to pass a test he got 30 marks and failed by 15 marks what is the maximum marks of the test
Answer» MAXIMUM MARK is 105

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If a,b,c are real and one root of ax^2 +bx+c =0 is 3+ √2 then the other toot is=?

the sum of interior angles of a regular polygon is twice the sum of its exterior angle find the number side of polygon

What is 4+4? and 2+2?and 3-3?and 4×3?

ramesh sold an article at a profit of 10%.had it been sold for RS 75 more the profit would have been 16 %find the cost price of the article

Find the sums given below:(1) 34+32+30+..........+10(2) -5+(-8)+(-11)+..........+(-230)

Bag contains 8 white and 6 red balls .the probability of drawing 2 ball of same color

A window is made of a square portion and an equilateral triangle above it

How to form a polynomial equation when we have the roots given

Consider the list of all the natural numbers multiples of 3 or 5 which are below 10

Find divisor if dividend is 4823597, quotient is 5008,and reminder is 893

Father 3 times age on his daughter, mother 2 times age on his son, mother and father difference age is 9, son and daughter difference age is 7, what is mothers age

Hey sove itfactorise 6(x+2y) here so cube of (x+2y) + 8(x+2y) here do square of (x+2y)try to understand

Pg number 112 of class 10 maths Q3. VIII part

in parallelogram ABCD t is equal to BC and AT intercept to intersects BD in M and DC in O . prove that AM square =MT×MO.

the age of rohan and rohit are in the ratio 3:7.five year from now the ratio of their ages will be 2:3find their present qge

Two consecutive even integers are ___________

Write decimal expansion of 129_2×2×5×5×5 without actual division

27×15×10×2cm square how can we solve it

A vessel can be filled by a pipe in 25 minutes and ut can be emptied by a waste pipe in 20 minutes .if both the pipes be opened when the vessel is full how soon will it be empty

Average age of 6 sons of a family is 8 years.the average age of sons together with their parents is 22 yrs. if the father is older than the mother by 8 years, the age of mother is

Average cost of 8 pens and 5 pencils is rs 25. while the average cost of 4 pens and 7 pencils is rs 21. what is the total cost of 18 pens and 18 pencils?

A train traveling at 60 kmph takes 27 seconds in passing a certain point. find the length of the train

A triangle has two sides of length 8 and 10 what value would the length of the third side be

you are given an arithmetic expression which contains only (+ - * /) operators. precision of (* /) is greater than precision of(+ -). you have to evaluate the expression if 2 consecutive same priority operator occur evaluate them from left to right.

How many seconds are there in ayear 365days?express the answer in standard notation

Express 84 as the sum of two prime numbers.write all such possible pairs of prime numbers

The cost of 15 notebooks is RS 144.find the cost of one such notebooks

What is the rote of 100952

In a quadrilateral angle angle b is 90° = angle d. prove that 2 Ac^2-bc^2=ab^2+ bc^2+ cd^2+ad^2

Find zeros and verify the relationship between 2 x square - 5x- 3

Please solve question 10 a and b part

2025 plants are to be planted in a garden in such a way that each row contains as many plants as the no. of rows .find the no. of rows and a no. plants in each row

A thief steals a car at 2:30pm and drives at 60km/h.the theft is discovered at 3pm and the owner sets off in another car at 75km/h.when will he overtake the thief?

A tank is 3 by 5 full of water 15 more are required to fill it up

A survey of 150 families each having 5 children fit a binomial distribution

Difference between quadratic inequalities and factorization

Example or numbers with billion and million together

Example of fraction problems with solution

Estimate by rounding to the nearest ten thousand 47539686-2474707 of th

Find the HCF of each the following groups of number using division method

6.2x= 8.1× 8.1 - 1.9× 1.9

Find x , ifPlease tell the answer fast

PLS SEND IT FAST........................I WILL MARK IT AS BRAINLIESTFactorise x4+4x²-12

Tanq+cot q=2 then the value of sinq is

Square + 1 upon x square is equal to 18 then find x cube + 1 upon x cube

A stone is projected vertically find the value of f^2h/gv^2

A and b working separately can do a piece of work in 20 and 15 days

Plz answer me fast I will mark u as brainiest.help me out fast...

Evaluate for x 36x=78sq.-48sq.

a student has to secure 40% marks to pass a test he got 30 marks and failed by 15 marks what is the maximum marks of the test