Questions by yogita

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If x varies inversely as y and when x = 6, y = 8, then for x = 8 the value of y is

asked Jan 17, 2022 in 8th-maths

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A contractor undertook a contract to complete a part of a stadium in 9 months with a team of 560 persons. Later on, it was required to complete the job in 5 months. How many extra persons should he employ to complete the

asked Jan 17, 2022 in 8th-maths

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Find the values of x and y if a and b are in inverse proportion: a. 12 x 8 b. 30 5

asked Jan 17, 2022 in 8th-maths

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From the following table, determine if x and y are in direct proportion or not. x 4 7 10 16 y 24 42 60 96

asked Jan 17, 2022 in 8th-maths

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If a and b vary inversely to each other, then find the values of p, q, r ; x, y, z and l, m, n. a 6 8 q 25 b 18 p 39 r

asked Jan 17, 2022 in 8th-maths

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At a particular time, the length of the shadow of Qutub Minar whose height is 72 m is 80 m. What will be the height of an electric pole, the length of whose shadow at the same time is 1000

asked Jan 17, 2022 in 8th-maths

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The variable x is inversely proportional to y. If x increases by p%, then by what per cent will y

asked Jan 17, 2022 in 8th-maths

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asked Jan 17, 2022 in 8th-maths

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What is the area of the largest triangle that can be fitted into a rectangle of length l units and width w

asked Jan 17, 2022 in 8th-maths

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The volume of a cube is 64 `cm^3`. Its surface area

asked Jan 17, 2022 in 8th-maths

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Total surface area of a cylinder of radius h and height r is

asked Jan 17, 2022 in 8th-maths

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Most of the sailboats have two sails, the jib and the mainsail. Assume that the sails are triangles. Find the total area of each sail of the sail boats to the nearest tenth.

asked Jan 17, 2022 in 8th-maths

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A boy is cycling such that the wheels of the cycle are making 140 revolutions per hour. If the diameter of the wheel is 60 cm, calculate the speed in km/h with which the boy is

asked Jan 17, 2022 in 8th-maths

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Find the area of the shaded portion in the following

asked Jan 17, 2022 in 8th-maths

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A cube of side 5 cm is cut into as many 1 cm cubes as possible. What is the ratio of the surface area of the original cube to that of the sum of the surface areas of the smaller

asked Jan 17, 2022 in 8th-maths

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A square sheet of paper is converted into a cylinder by rolling it along its side. What is the ratio of the base radius to the side of the

asked Jan 17, 2022 in 8th-maths

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A housing society consisting of 5,500 people needs 100 L of water per person per day. The cylindrical supply tank is 7 m high and has a diameter 10 m. For how many days will the water in the tank last for the

asked Jan 17, 2022 in 8th-maths

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `p^5 –

asked Jan 17, 2022 in 8th-maths

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Factorise the expressions and divide them as directed: `(2x^3 – 12x^2 + 16x) -: (x – 2) (x –

asked Jan 17, 2022 in 8th-maths

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The area of a rectangle is `x2 + 7x + 12`. If its breadth is (x + 3), then find its

asked Jan 17, 2022 in 8th-maths

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