81279 + Interview Questions in Mathematics QA in Mathematics

1.	The shape of a garden is rectangular in the middle and seni cncalat the ends as shown in the diagram. Find the area and the perimeterT of this garden [Length of rectangle is7m 20- (3.5+3.5) metres).
Answer»

Discussion

2.	Square: A rectanglewith sides of equallengthAll the properties of a prhombus and a rectangl
Answer» It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles areequal(360°/4 = 90°). It can also be defined as a parallelogram containing a right angle. Arectangle with foursidesofequallength is a square.

Discussion

3.	This is the thira alt(-35) 719 15
Answer» (-35)/19 - 7/15 Take LCM =[(-35)15 - 719] / 19*15=(- 525 - 133) /285= - 658/285 ans

3.

This is the thira alt(-35) 719 15

Answer»

(-35)/19 - 7/15

Take LCM

=[(-35)*15 - 7*19] / 19*15=(- 525 - 133) /285= - 658/285 ans

Discussion

4.	Find the area of a square of side 13 3/4 m
Answer» Side= ((134)+3)/4m=55/4 marea of square=sideside=(55/4)*(55/4)m^2=189m^2

Discussion

5.	100 is sulferad FindBy selling a tape recorder for Rs 600 a loss ofAlso, find loss per cent.its Gost prica
Answer» S.P.=600loss=100so C.P.=700so loss percentage=100/700*100=14.28%

Discussion

6.	12,100 in few years, find the duration of investment if the rate ofi10.000 amounts tocompounded annually(3) Ifinterest isSolution:.
Answer» Please hit the like button if this helped you hi

6.

12,100 in few years, find the duration of investment if the rate ofi10.000 amounts tocompounded annually(3) Ifinterest isSolution:.

Answer»

Please hit the like button if this helped you

hi

Discussion

7.	ExePeISEA train leaves Chennai at 10:30 p.m. on Saturday and reaches Bangaloreon Sundsy Find the duration of the journeynd the time taken by the Nijamuddin A
Answer»

Discussion

8.	13. Find the side of a square whose area is 825 cm
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Discussion

9.	13. Find the side of a square whose area is 625 cm
Answer» I don't understand this hand-writing

Discussion

10.	13. Find theside of a square whose area is 825 cm2
Answer»

Discussion

11.	A square lawn is surrounded by a path 2.5 m wide. If the area of the path is 165 m2, findthe area of the lawn.
Answer»

Discussion

12.	16. A square lawn is surrounded by a path 2.5 m wide. If the area of the path is 165 m2, find thearea of the lawn.
Answer»

Discussion

13.	A square lawn is surrounded by a path 2.5 m wide. If the athe area of the lawn.rea of the path is 165 m2. find
Answer»

Discussion

14.	\frac{\left(2^{n}+2^{n-1}\right)}{\left(2^{n+1}-2^{n}\right)}
Answer» right answer

Discussion

15.	244Example4 Mayank made a bird-bath for his garden 30 cmin the shape of a cylinder with a hemisphericaldepression at one end (see Fig. 13.9). The height ofthe cylinder is 1.45 m and its radius is 30 cm. Find the
Answer»

Discussion

16.	ull Cost of developing a garden arounthe house at the rate of R 55 per m.The shape of a garden is rectangular in the middle and semi circulat the ends as shown in the diagram. Find the area and the perimeT of this garden [Length of rectangl7m 20-(3.5+3.5) metres].20m
Answer»

Discussion

17.	John sold an article to Peter at 20% profit andPeter sold it to Mohan at 5% loss. If Mohanpaid 912 for the article; find how much didJohn pay for it ?
Answer» Let John buy the article at a cost C. Peter buys it at (100+20)C/100 = 1.2 C Peter sells to Mohan at = [ (100-5) /100 ] * 1.2 C = 0.95 * 1.2 C = 1.14 C Mohan buys it for 1.14 C = Rs 912 C = Rs 912 / 1.14 = Rs 800 John paid Rs 800 for the article.

17.

John sold an article to Peter at 20% profit andPeter sold it to Mohan at 5% loss. If Mohanpaid 912 for the article; find how much didJohn pay for it ?

Answer»

Let John buy the article at a cost C.

Peter buys it at (100+20)C/100 = 1.2 C

Peter sells to Mohan at = [ (100-5) /100 ] * 1.2 C = 0.95 * 1.2 C = 1.14 C

Mohan buys it for 1.14 C = Rs 912

C = Rs 912 / 1.14 = Rs 800

John paid Rs 800 for the article.

Discussion

18.	Rajesh12, John sold an article to Peter at 20% profit andPeter sold it to Mohan at 5% loss. If Mohanpaid 912 for the article; find how much didJohn pay for it ?
Answer» Let John buy the article at a cost C. Peter buys it at (100+20)C/100 = 1.2 C Peter sells to Mohan at = [ (100-5) /100 ] * 1.2 C = 0.95 * 1.2 C = 1.14 C Mohan buys it for 1.14 C = Rs 912 C = Rs 912 / 1.14 = Rs 800 John paid Rs 800 for the article.

18.

Rajesh12, John sold an article to Peter at 20% profit andPeter sold it to Mohan at 5% loss. If Mohanpaid 912 for the article; find how much didJohn pay for it ?

Answer»

Let John buy the article at a cost C.

Peter buys it at (100+20)C/100 = 1.2 C

Peter sells to Mohan at = [ (100-5) /100 ] * 1.2 C = 0.95 * 1.2 C = 1.14 C

Mohan buys it for 1.14 C = Rs 912

C = Rs 912 / 1.14 = Rs 800

John paid Rs 800 for the article.

Discussion

19.	Gopi sold a watch to Ibrahim at 12% gain and Ibrahim sold it to John at a loss of 5%. IfJohn paid 330, then find how much did Gopi sold it?
Answer»

Discussion

20.	aganlal bought trousers for 400 and a shirt for R 200 and sold them forand 250 respectively. Which of these transactions was more profitable?1. M
Answer»

Discussion

21.	nnum. iEXERCISE 8.3Tell what is the profit or loss in the following transactions. Also findloss per cent in each case.(a) Gardening shears bought for ?250 and sold for? 325.(b) A refrigerater bought for 12,000 and sold at 13,500.(c) A cupboard bought for ? 2,500 and sold at 3,000.(d) A skirt bought for 250 and sold at 150.
Answer»

Discussion

22.	Fint the ratio in which the line x -y 2 divides the line segment joining the points A(3,-1) and B(8,9).
Answer»

Discussion

23.	king Mr. Gupta's office starts at 10:15 a.m. and closes at 7: 15 p.m. Find thetime duration ofher office.
Answer»

Discussion

24.	Tell what is the profit or loss in the following transactions. Also find profit per cent orloss per cent in each case.(a) Gardening shears bought for 250 and sold fort 325,(b) A refrigerater bought for ? 12,000 and sold at 13,500.(c) A cupboard bought for 2,500 and sold at 73,000(d) A skirt bought for ? 250 and sold at 150.1.
Answer» Very nice

Discussion

25.	a)A skirt bought for250 and sold at150.
Answer» Cost price of skirt = Rs. 250 Selling price of skirt = Rs. 150 Since, C.P. > S.P., therefore here is loss. ∴∴Loss = C.P. – S.P. = 250 – 150 = Rs. 100 Now Loss% =Loss/C.P.×100 =100/250×100= 40% Therefore, Profit = Rs. 100 and Profit% = 40%

25.

a)A skirt bought for250 and sold at150.

Answer»

Cost price of skirt = Rs. 250

Selling price of skirt = Rs. 150

Since, C.P. > S.P., therefore here is loss.

∴∴Loss = C.P. – S.P. = 250 – 150 = Rs. 100

Now Loss% =Loss/C.P.×100

=100/250×100= 40%

Therefore, Profit = Rs. 100 and Profit% = 40%

Discussion

26.	A skirt bought for Rs 250 and sold Rs150
Answer» please complete the question, fully. CP=250SP=150PROFIT=250-150=100PROFIT PERCENTAGE=100/250*100=40% thanku😊

26.

A skirt bought for Rs 250 and sold Rs150

Answer»

please complete the question, fully.

CP=250SP=150PROFIT=250-150=100PROFIT PERCENTAGE=100/250*100=40%

thanku😊

Discussion

27.	ta itA-Bland A114]then A is equal to-5 3(2) 2(4)-3,(3) 3
Answer»

Discussion

28.	1. A rectangular garden 30 m long and 25 m wide has a path 2.5 m wide running all aroundinside it. Find the area of the path.205
Answer» Outer Area = 30m × 25 m=750 m^2Iner length = 30 m - (2.5m + 2.5m )= 25mIner breadth = 25m - ( 2.5 m + 2.5 m )= 20mIner Area = 25m × 20m= 500 m^2Area of the path = Outer Area - Iner Area= 750 m^2 - 500m^2=250m^2 Thanks

28.

1. A rectangular garden 30 m long and 25 m wide has a path 2.5 m wide running all aroundinside it. Find the area of the path.205

Answer»

Outer Area = 30m × 25 m=750 m^2Iner length = 30 m - (2.5m + 2.5m )= 25mIner breadth = 25m - ( 2.5 m + 2.5 m )= 20mIner Area = 25m × 20m= 500 m^2Area of the path = Outer Area - Iner Area= 750 m^2 - 500m^2=250m^2

Thanks

Discussion

29.	5. The length and breadth of a rectangular park are in the ratio 5 : 2. A 2.5 m wide path running allaround the outside the park has an area 305 m2. Find the dimensions of the park.
Answer» Thank you Bhai

Discussion

30.	The length and breadth of a rectangular park are in the ratio 5: 2. A 2.5m wide path running all aroundthe inside of the park has an area of 290m2. Find the dimensions of the park.12.
Answer» If the area is 290 sq m then, let the length of the rectangular park be 5x∴ breadth will be 2xso area= lb 5x2x =10x²width of the park all around the park=2.5m∴lenght and breadth including path (5x+2.5 +2.5)m=(5x+5) and breadth of rectangular park=(2x+2.5+2.5)=(2x+5)thus, area of the park=[(5x+2)(2x+5)-10x²]m²=(35x+25)m²it is given that 35x +25 =290⇒35x=265x=53/7thus the lenght of the park=553/7=265/7m and breadth of the park=253/7=106/7m hit like if you find it useful

30.

The length and breadth of a rectangular park are in the ratio 5: 2. A 2.5m wide path running all aroundthe inside of the park has an area of 290m2. Find the dimensions of the park.12.

Answer»

If the area is 290 sq m then,

let the length of the rectangular park be 5x∴ breadth will be 2xso area= l*b 5x*2x =10x²width of the park all around the park=2.5m∴lenght and breadth including path (5x+2.5 +2.5)m=(5x+5) and breadth of rectangular park=(2x+2.5+2.5)=(2x+5)thus, area of the park=[(5x+2)(2x+5)-10x²]m²=(35x+25)m²it is given that 35x +25 =290⇒35x=265x=53/7thus the lenght of the park=5*53/7=265/7m and breadth of the park=2*53/7=106/7m

hit like if you find it useful

Discussion

31.	. The length and breadth of a rectangular park are in the ratio 5: 2. A 2.5 m wide path runningaround the outside of the park has an area of 305 m2. Find the dimensions ofthe park.
Answer»

Discussion

32.	The length and breadth of a rectangular park are in the ratio 5:2. A 2.5-m-wide pathrunning all around the outside of the park has an area of 305 m2. Find the dimensions ofthe park.
Answer»

Discussion

33.	0. The length and breadth of a rectangular park are in the ratio 5:2. A 2.5-m-wide pathrunning all around the outside of the park has an area of 305 m2. Find the dimensions of,De park.
Answer» thanks

Discussion

34.	10. The length and breadth of a rectangular park are in the ratio 5:2. A 2.5-m-wide pathrunning all around the outside of the park has an area of 305 m2. Find the dimensions ofthe park.
Answer»

Discussion

35.	A path 2.5 m wide is running around a square field whose side is 45 m. Determine the areaof the path.1im long and 125m wide. A carpet is to be laid on the floor
Answer»

Discussion

36.	He costof constructngheToausatthoTto15. The length and breadth of a rectangular park are in the ratio 5:2. A 2.5 m wide path running allaround the outside the park has an area 305 m2. Find the dimensions of the park.
Answer»

Discussion

37.	1) Find the value of (-10m?n) x (-20mn45) for m= 1.2 and n=-1.
Answer» (-10×1.44×-1)×(-20×1.2×1)=(14.4)×(-24)=-345.6

Discussion

38.	The rates of working of A and B are in the ratio 3: 4. The number of days taken by them to finish the work are in the ratio(a) 3:4(b) 9:16(c) 4:3
Answer» I can't able to understand

Discussion

39.	The present ages of Anita and Vinita are in the ratio 4:5. Ten years ago, their ageratio 3:4. What are their present ages ?16.s were in the
Answer»

Discussion

40.	Find the coordinates of the point which divides the linesegment joining (-1, 3) and (4, -7) internally in the ratio3:4.1.
Answer»

Discussion

41.	If two towers of height hi and h2 subtend angles 60° and 30 respectively at the mid-point of line joining their bases them hi
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Discussion

42.	given a choice toGG for short. You luould you like to meet?Jyotindra Mohan Challuse in his time old GG was fallOUhen went on to write grammar booksght an almirah foră2000 and spentts of money2254. What per cent did he gain or lose?300 on getting it painted. He then sold it foror16 000 and spent150
Answer»

Discussion

43.	Sub MatTo scupsu sen 3 digu mumben on amcacusA) move s stats sd8) maut stepsmove ass backwandEill in thu blanks3 equal taFasntoCourting used to
Answer» 5-3=2 it can be written like this

43.

Sub MatTo scupsu sen 3 digu mumben on amcacusA) move s stats sd8) maut stepsmove ass backwandEill in thu blanks3 equal taFasntoCourting used to

Answer»

5-3=2

it can be written like this

Discussion

44.	DO8. The weight ofis the weight84ofidentical books is 12 kg. what35 such books?
Answer» 84books=12kg then 1book=12/84 then 35books=12/84×35=5kg

Discussion

45.	4. The diameter of the sun is 1.4 × 109 m and the diameter of the earth is 1.2756 × 10, m. snowdiameter of the sun is nearly 100 times the diameter of the earth.
Answer» Diameter of sun = 1.4 * 10 mDiameter of earth = 1.2756 * 10 mHence Diameter of sun = 109.75 * radius of earthSo sun is nearly 109 times larger than earth in diameter how do you convert the exponent bro

45.

4. The diameter of the sun is 1.4 × 109 m and the diameter of the earth is 1.2756 × 10, m. snowdiameter of the sun is nearly 100 times the diameter of the earth.

Answer»

Diameter of sun = 1.4 * 10 mDiameter of earth = 1.2756 * 10 mHence Diameter of sun = 109.75 * radius of earthSo sun is nearly 109 times larger than earth in diameter

how do you convert the exponent bro

Discussion

46.	I.(i) Find the sum ofn terms ofa series l+-+-i--+âŚ
Answer»

Discussion

47.	ăŹ29. ll' the sum ofn, terms of an AP is the same as the sumoller,they meet in I hour. What are the spceds of the two cars?(m + n) terms is 0.of n terms, show that the sum of
Answer»

Discussion

48.	7.TheFne diarneter of the modiameterofthemoonisapproximatelyxmne fourth of the diameter of the earth.onefourthofthediameteroftheearth.
Answer» Let diameter of earth = D diameter of moon =D/4 =) radius of earth = D/2 =) radius of moon = D/8 earth and moon are like spheres. curved surface area of earth = 4π(D/2)^2 curved surface area of moon = 4π(D/8)^2 so ratio of their surface area = 64/4 = 16:1

48.

7.TheFne diarneter of the modiameterofthemoonisapproximatelyxmne fourth of the diameter of the earth.onefourthofthediameteroftheearth.

Answer»

Let diameter of earth = D

diameter of moon =D/4

=) radius of earth = D/2

=) radius of moon = D/8

earth and moon are like spheres.

curved surface area of earth = 4π(D/2)^2

curved surface area of moon = 4π(D/8)^2

so ratio of their surface area

= 64/4 = 16:1

Discussion

49.	Also the sum or the l rnas casefindfitsconIfthe sum of the first a term of an APithe fist torm charis sWaais the sum of first two terns? What is the second serm? Samilarbh, find the Jrd, the 10th ansdthe nth terms.
Answer»

Discussion

50.	The diameter of the sun is 1.4 x 10m and the diameter of Pluto is 23 x 10 m. How many times moreis the diameter of sun as compared to that of Pluto?
Answer» what is your question

Discussion

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The shape of a garden is rectangular in the middle and seni cncalat the ends as shown in the diagram. Find the area and the perimeterT of this garden [Length of rectangle is7m 20- (3.5+3.5) metres).

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\frac{\left(2^{n}+2^{n-1}\right)}{\left(2^{n+1}-2^{n}\right)}

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5. The length and breadth of a rectangular park are in the ratio 5 : 2. A 2.5 m wide path running allaround the outside the park has an area 305 m2. Find the dimensions of the park.

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. The length and breadth of a rectangular park are in the ratio 5: 2. A 2.5 m wide path runningaround the outside of the park has an area of 305 m2. Find the dimensions ofthe park.

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