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5901.

Write (19)−12×(64)−13 as a rationalnumber.

Answer»

Write (19)12×(64)13 as a rationalnumber.

5902.

Comment on the nature of the roots of the equation 2x2–6x+8=0

Answer»

Comment on the nature of the roots of the equation 2x26x+8=0



5903.

In an event there are two possible outcomes, the probability of occurrence of one outcome is 1. The probability of occurrence of the other outcome is:

Answer»

In an event there are two possible outcomes, the probability of occurrence of one outcome is 1. The probability of occurrence of the other outcome is:


5904.

If d1, d2 (d2 > d1) be the diameters of two concentric circle s and c be the length of a chord of a circle which is tangent to the other circle , prove that d22 = c2 + d12.

Answer» If d1, d2 (d2 > d1) be the diameters of two concentric circle s and c be the length of a chord of a circle which is tangent to the other circle , prove that d22 = c2 + d12.
5905.

A parallelogram of area 24 sq cm was divided in two triangles by joining two opposite vertices. Find the area of each triangle.

Answer» A parallelogram of area 24 sq cm was divided in two triangles by joining two opposite vertices. Find the area of each triangle.
5906.

18. a,b,c,d,e are concyclic such that ab=bc=cd=de=ea find the angle between any two adjacent chords

Answer» 18. a,b,c,d,e are concyclic such that ab=bc=cd=de=ea find the angle between any two adjacent chords
5907.

The painter charged ₹ 5 per m2 to paint the wall, as shown in the figure. Calculate the area to be painted and the money to be paid to the painter, if the dimensions of the door is 3 m×2 m and that of the wall is 8 m×8 m.

Answer»

The painter charged ₹ 5 per m2 to paint the wall, as shown in the figure. Calculate the area to be painted and the money to be paid to the painter,

if the dimensions of the door is 3 m×2 m and that of the wall is 8 m×8 m.


5908.

If f(x) = x4 − 2x3 + 3x2 − ax − b when divided by x − 1, the remainder is 6, then find the value of a + b

Answer» If f(x) = x4 − 2x3 + 3x2 − ax − b when divided by x − 1, the remainder is 6, then find the value of a + b
5909.

Let f: X> Y such that X = = {1, 3, 5, 7) and Y = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13). Find the elements of f if y = f (x) = 2x 1.

Answer» Let f: X> Y such that X = = {1, 3, 5, 7) and Y = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13). Find the elements of f if y = f (x) = 2x 1.
5910.

If the interest is compounded half-yearly, calculate the amount when the principal is Rs. 7,400; the rate of interest is 5% per annum and the duration is one year.

Answer»

If the interest is compounded half-yearly, calculate the amount when the principal is Rs. 7,400; the rate of interest is 5% per annum and the duration is one year.

5911.

The measure of the angle between the coordinate axes is(a) 0°(b) 90°(c) 180°(d) 360°

Answer» The measure of the angle between the coordinate axes is



(a) 0°



(b) 90°



(c) 180°



(d) 360°
5912.

Given are three cylindrical buckets X, Y, Z whose circular bases are of radii 1, 2, 3 units, respectively, Initially, water is filled in these buckets up to the same height. Some water is then transferred from Z to X so that they both have the same volume of water. Some water is then transferred between X and Y so that they both have the same volume of water. If hy, hz denote the heights of water at this stage in the buckets Y,Z, respectively, then the ratio hyhz equals.

Answer»

Given are three cylindrical buckets X, Y, Z whose circular bases are of radii 1, 2, 3 units, respectively, Initially, water is filled in these buckets up to the same height. Some water is then transferred from Z to X so that they both have the same volume of water. Some water is then transferred between X and Y so that they both have the same volume of water. If hy, hz denote the heights of water at this stage in the buckets Y,Z, respectively, then the ratio hyhz equals.



5913.

Question 6 Area of a rectangle and the area of a circle are equal. If the dimensions of the rectangle are 14cm×11cm, then the radius of the circle is (a) 21 cm (b) 10.5 cm (c) 14 cm (d) 7 cm

Answer» Question 6

Area of a rectangle and the area of a circle are equal. If the dimensions of the rectangle are 14cm×11cm, then the radius of the circle is

(a) 21 cm
(b) 10.5 cm
(c) 14 cm
(d) 7 cm
5914.

[(B′∪(B′−A))]′ =___

Answer»

[(B(BA))] =___


5915.

ch-4 practical geometry 4.1 construction of unique quadrilateral when three sides and two diagonals are given Q1 is not clear

Answer» ch-4 practical geometry 4.1 construction of unique quadrilateral when three sides and two diagonals are given Q1 is not clear
5916.

In the given figure, ACB is a line such that ∠DCA = 5x and ∠DCB = 4x. Find the values of ∠DCA and ∠DCB.

Answer» In the given figure, ACB is a line such that ∠DCA = 5x and ∠DCB = 4x. Find the values of ∠DCA and ∠DCB.

5917.

An isosceles triangle has sides 4a, b and b. Find the length of the perpendicular dropped onto the unequal side from the vertex opposite to this side.

Answer»

An isosceles triangle has sides 4a, b and b. Find the length of the perpendicular dropped onto the unequal side from the vertex opposite to this side.



5918.

What is the remainder obtained when the polynomial P(x) = x7+9x5+5x3+x−1 is divided by x–1?

Answer»

What is the remainder obtained when the polynomial P(x) = x7+9x5+5x3+x1 is divided by x1?



5919.

If 5tanθ=4, then the value of (5sinθ − 4cosθ)(5sinθ + 4cosθ) is

Answer»

If 5tanθ=4, then the value of (5sinθ 4cosθ)(5sinθ + 4cosθ) is



5920.

Determine the ratio of the lateral surface area to total surface area of a cube.

Answer»

Determine the ratio of the lateral surface area to total surface area of a cube.



5921.

Question 55Fill in the blanks to make the statements true.In quadrilateral WXYZ, the pairs of opposite angles are ___.

Answer» Question 55

Fill in the blanks to make the statements true.


In quadrilateral WXYZ, the pairs of opposite angles are ___.


5922.

33. Find the angle between the two straight lines 3x=4y+7 and 5y=12x+6 and also the equations to the two straight lines which pass through the point (4,5) and make equal angles with the two given lines.

Answer» 33. Find the angle between the two straight lines 3x=4y+7 and 5y=12x+6 and also the equations to the two straight lines which pass through the point (4,5) and make equal angles with the two given lines.
5923.

The area of a sector of a circle of 6 cm radius is 15π sq.cm. Find the measure of the arc and length of the arc corresponding to the sector.

Answer»
The area of a sector of a circle of 6 cm radius is 15π sq.cm. Find the measure of the arc and length of the arc corresponding to the sector.
5924.

Name all the properties of surds with examples?

Answer»

Name all the properties of surds with examples?

5925.

If P is a 3×3 matrix such that PT=2P+I, where PT is the transpose of P and I is the 3×3 identity matrix, then there exists a column matrix X=⎡⎢⎣xyz⎤⎥⎦≠⎡⎢⎣000⎤⎥⎦ such that

Answer»

If P is a 3×3 matrix such that PT=2P+I, where PT is the transpose of P and I is the 3×3 identity matrix, then there exists a column matrix X=xyz000 such that

5926.

The ordinate of every point on the x-axis is(a) 1(b) –1(c) 0(d) any real number

Answer» The ordinate of every point on the x-axis is

(a) 1

(b) –1

(c) 0

(d) any real number
5927.

At whichpoint does the SMC curve intersect SAC curve? Give reason in supportof your answer.

Answer»

At which
point does the SMC curve intersect SAC curve? Give reason in support
of your answer.

5928.

Any pair of supplementary angles sum up to _____

Answer»

Any pair of supplementary angles sum up to _____



5929.

If one angle of a triangle is 120°,then the angle between the bisectors of the other two angles can be: (a)50° (b)95° (C)100° (d)75° And why?

Answer» If one angle of a triangle is 120°,then the angle between the bisectors of the other two angles can be:
(a)50°
(b)95°
(C)100°
(d)75°
And why?
5930.

YA is the bisector of ∠XYZ. O is any point on YA. If OP is parallel to YZ, then △YPO is _____.

Answer»

YA is the bisector of XYZ. O is any point on YA. If OP is parallel to YZ, then YPO is _____.


5931.

Pentagon is a polygon with ___ sides.

Answer»

Pentagon is a polygon with ___ sides.


5932.

Explain 3,4,5 right angle triangle procedure for finding θ for t-rati

Answer» Explain 3,4,5 right angle triangle procedure for finding θ for t-rati
5933.

Question 20 A recent survey found that ages of workers in a factory as follows: Age(in years)20−2930−3940−4950−5960 and aboveNumber of382786463workers If a person is selected at random, find the probability that the person is: (i) 40 years or more. (ii) Under 40 years. (iii) Having age from 30 - 39 years. (iv) Under 60 but over 39 years.

Answer»

Question 20
A recent survey found that ages of workers in a factory as follows:

Age(in years)202930394049505960 and aboveNumber of382786463workers


If a person is selected at random, find the probability that the person is:
(i) 40 years or more.
(ii) Under 40 years.
(iii) Having age from 30 - 39 years.
(iv) Under 60 but over 39 years.

5934.

In the given figure, ABC is a triangle and FD is a median of ΔFBC. If DE||BF,AB||DF and area of ΔABC=48 cm2, then ar(ΔADF)+ar(ΔBDE) is

Answer»

In the given figure, ABC is a triangle and FD is a median of ΔFBC. If DE||BF,AB||DF and area of ΔABC=48 cm2, then ar(ΔADF)+ar(ΔBDE) is




5935.

By inspection, 9 (2a - 3b)2 - 12 (2a - 3b) gives

Answer»

By inspection, 9 (2a - 3b)2 - 12 (2a - 3b) gives


5936.

Question 14 The points scored by a basketball team in a series of matches are as follows. 17, 2, 7, 27, 25, 5, 14, 18, 10, 24, 48, 10, 8, 7, 10, 28 Find the median and mode of the data.

Answer» Question 14
The points scored by a basketball team in a series of matches are as follows.
17, 2, 7, 27, 25, 5, 14, 18, 10, 24, 48, 10, 8, 7, 10, 28
Find the median and mode of the data.
5937.

Find all the interior angles of the cyclic quadrilateral ABCD.

Answer»

Find all the interior angles of the cyclic quadrilateral ABCD.





5938.

Which of the following figures lie on the same base and between the same parallels.In such a case,write the common base and the two parallels.

Answer» Which of the following figures lie on the same base and between the same parallels.In such a case,write the common base and the two parallels.




5939.

Factorise: 10x2−9x−7

Answer»

Factorise:
10x29x7

5940.

An equation of the type ------------- represents a line passing through the origin.

Answer»

An equation of the type ------------- represents a line passing through the origin.


5941.

ABC is a triangle in which D is the mid-point of BC. E and F are mid-points of DC and AE respectively. IF area of ΔABC is 16 cm2, find the area of ΔDEF.

Answer» ABC is a triangle in which D is the mid-point of BC. E and F are mid-points of DC and AE respectively. IF area of ΔABC is 16 cm2, find the area of ΔDEF.
5942.

What is 40% of 20?

Answer»

What is 40% of 20?



5943.

Prove that 3 + 5 is an irrational number.

Answer» Prove that 3 + 5 is an irrational number.
5944.

Question 2A cuboidal water tank is 6 m long, 5 m wide and 4.5 m deep. How many litres of water can it hold? (1m3=1000l)

Answer»

Question 2

A cuboidal water tank is 6 m long, 5 m wide and 4.5 m deep. How many litres of water can it hold? (1m3=1000l)



5945.

Question 6Write True or False and justify your answer:The base and the corresponding altitude of a parallelogram are 10cm and 3.5cm, respectively. The area of the parallelogram is 30 cm2.

Answer» Question 6

Write True or False and justify your answer:



The base and the corresponding altitude of a parallelogram are 10cm and 3.5cm, respectively. The area of the parallelogram is 30 cm2.
5946.

If I make any changes in the diagonal of a square. Will it affect its area? If yes, then how?

Answer» If I make any changes in the diagonal of a square. Will it affect its area? If yes, then how?
5947.

If the points P(2a+3,b−3) andQ(5a−3,1−3b)are coincident, then the distance of the point P from the origin is

Answer»

If the points P(2a+3,b3) andQ(5a3,13b)

are coincident, then the distance of the point P from the origin is

5948.

Two points A & B are marked on the number line as shown in the figure. B = 7 and the distance between them is 20 units. Point A is

Answer»

Two points A & B are marked on the number line as shown in the figure. B = 7 and the distance between them is 20 units. Point A is


5949.

93. If 4cot-[1/(2-3)] =tan-(1/3x) +tan- 1/5 then x is equal to

Answer» 93. If 4cot-[1/(2-3)] =tan-(1/3x) +tan- 1/5 then x is equal to
5950.

If 3x+b1y+5=0 and 4x+b2y+10=0 cut the x-axis and y-axis in four concyclic points , then the value of b1b2 i

Answer» If 3x+b1y+5=0 and 4x+b2y+10=0 cut the x-axis and y-axis in four concyclic points , then the value of b1b2 i