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291. The surface area of a sphere is 5544 cm². The diameter of the sphere (in cm) is:

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292. Six cubes each of edge 2 cm are joined end to end. The total surface area (in cm²) of resulting cuboid is:

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293. The heights of two cylinders are in the ratio 5 : 3 and their volumes are in the ratio 20 : 27. Then the ratio of their radii is:

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294. If the volume of a right circular cone of height 9 cm is 48π cm³, then its radius of base (in cm) is:

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295. A well of diameter 8 m has been dug out to a depth of 21 m. The volume of earth (in m³) dug out is:

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296. The edge of a solid cube is 20 cm. The number of small solid cubes of eye 5 cm that can be formed from this cube is:

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297. If each side of a cube is increased by 50%, then the surface are of the cube increases by:

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6 times

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299. Curved surface area of a right circular cylinder is 8.8 m². If the radius of the base of the cylinder is 1.4 m, its height is equal to

open parentheses Use space straight pi equals 22 over 7 close parentheses

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300. The volumes of the largest cone which can be cut from a cube of edge ‘a’ is:

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