241.The radius of a sphere is r and the base radius and height of a cylinder are r and 2r respectively. The ratio of the volumes of sphere and cylinder is
2 : 3
3 : 4
4 : 3
4 : 3
A.
2 : 3
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242.The slant height of a right circular cone is 17 cm and the radius is 8 cm. The measure of the height of the cone is
9 cm
15 cm
20 cm
20 cm
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243.The height of a right circular cone is 16 cm and the base radius is 12 cm. The measure of the slant height of the cone is
18 cm
20 cm
25 cm
25 cm
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244.The diameter of a sphere is d. Its volume is
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245.The volume of a right circular cone of height 14 cm is 168π cm3. The radius of the cone is
6 cm
12 cm
8 cm
8 cm
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246.
The ratio of the radii of two spheres is 4 : 5. The ratio of their whole surface areas is
4 : 5
5 : 4
5 : 4
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247.The ratio of the surface areas of the two spheres is 16 : 49. The ratio of their radii is
7 : 4
4 : 7
8 : 24.5
8 : 24.5
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248.The heights of two right circular cylinders are the same. Their volumes are 16π m3and 81 π m3 respectively. The ratio of their base radii is
16 : 81
4 : 9
2 : 3
2 : 3
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249.The internal and external radii of a semi-spherical cup are r1 and r2 respectively. The curved surface area of the cup is
(r1,2 + r22)
2(r12 + r22)
2(r22 – r12)
2(r22 – r12)
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250.The ratio of the volumes of the two spheres is 1 : 27. The ratio of their radii is
Multiple Choice Questions
(r1,2 + r22)
(r12 + r22)
(r22 – r12)
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