Questions by nishit

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Two quantities x and y are said to vary directly with each other if for some rational number k, xy =

asked Jan 17, 2022 in 8th-maths

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If x and y are in inverse proportion, then (x + 1) and (y + 1) are also in inverse

asked Jan 17, 2022 in 8th-maths

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For fixed time period and rate of interest, the simple interest is directly proportional to the

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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It is given that l varies directly as m. (i) Write an equation which relates l and m. (ii) Find the constant of proportion (k), when l is 6 then m is

asked Jan 17, 2022 in 8th-maths

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If a deposit of Rs 2,000 earns an interest of Rs 500 in 3 years, how much interest would a deposit of Rs 36,000 earn in 3 years with the same rate of simple

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 2 y 6 10 b x 12.5 15 z

asked Jan 17, 2022 in 8th-maths

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If the height of a cylinder becomes `1/4` of the original height and the radius is doubled, then which of the following will be

asked Jan 17, 2022 in 8th-maths

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What is the area of the rhombus ABCD below if AC = 6 cm, and BE = 4cm?

asked Jan 17, 2022 in 8th-maths

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Two cubes have volumes in the ratio 1:64. The ratio of the area of a face of first cube to that of the other

asked Jan 17, 2022 in 8th-maths

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If R is the radius of the base of the hat, then the total outer surface area of the hat is

asked Jan 17, 2022 in 8th-maths

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Two cylinders A and B are formed by folding a rectangular sheet of dimensions `20 cm xx 10 cm` along its length and also along its breadth respectively. Then volume of A is ________ of volume of

asked Jan 17, 2022 in 8th-maths

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The areas of any two faces of a cube are

asked Jan 17, 2022 in 8th-maths

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asked Jan 17, 2022 in 8th-maths

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Find the area to be painted in the following block with a cylindrical hole. Given that length is 15 cm, width 12 cm, height 20 cm and radius of the hole 2.8 cm.

asked Jan 17, 2022 in 8th-maths

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The ratio of the radius and height of a cylinder is 2:3. If its volume is 12,936 `cm^3`, find the total surface area of the

asked Jan 17, 2022 in 8th-maths

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External dimensions of a closed wooden box are in the ratio 5:4:3. If the cost of painting its outer surface at the rate of Rs 5 per d`m^2` is Rs 11,750, find the dimensions of the

asked Jan 17, 2022 in 8th-maths

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Perform the following divisions: `(ax^3 – bx^2 + cx) -: (–

asked Jan 17, 2022 in 8th-maths

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Factorise the expressions and divide them as directed: `(x^3 + x^2 – 132x) -: x (x –

asked Jan 17, 2022 in 8th-maths

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The area of a square is `9x^2 + 24xy + 16y^2`. Find the side of the

asked Jan 17, 2022 in 8th-maths

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