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

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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The areas of any two faces of a cube are

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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Two cuboids with equal volumes will always have equal surface

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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A cube of side 3 cm painted on all its faces, when sliced into 1 cubic centimetre cubes, will have exactly 1 cube with none of its faces

asked Jan 17, 2022 in 8th-maths by Simran (1.8k points)

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Radius of a cylinder is r and the height is h. Find the change in the volume if the (a) height is doubled. (b) height is doubled and the radius is halved. (c) height remains same and the radius is

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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A wooden box (including the lid) has external dimensions 40 cm by 34 cm by 30 cm. If the wood is 1 cm thick, how many `cm^3` of wood is used in

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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A swimming pool is 200 m by 50 m and has an average depth of 2 m. By the end of a summer day, the water level drops by 2 cm. How many cubic metres of water is lost on the

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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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 by vaibhav (1.7k points)

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A rectangular sheet of dimensions `25 cm xx 7 cm` is rotated about its longer side. Find the volume and the whole surface area of the solid thus

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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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 by nishit (1.8k points)

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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 by nishit (1.8k points)

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The curved surface area of a cylinder is `2pi (y^2 – 7y + 12)` and its radius is (y – 3). Find the height of the cylinder (C.S.A. of cylinder

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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If m – n = 16 and `m^2 + n^2 = 400`, then find

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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Find the value of a, if `pq^2a = (4pq + 3q)^2 – (4pq –

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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Subtract `b (b^2 + b – 7) + 5` from `3b^2 – 8` and find the value of expression obtained for `b = –

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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Find the value of (i) `(6.25 6.25 –1.75 1.75)/4.5` (ii) `(198 198 –102

asked Jan 17, 2022 in 8th-maths by krutika (1.7k points)

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Multiplicative inverse of `2^7`

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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`(-4)^4 xx(5/4)^4`

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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If x be any integer different from zero and m, n be any integers, then `(x^m)^n` is equal

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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`[2^(–1) + 3^(–1) + 4^(–1)]^0` =

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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