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A water tank open at the top is hemis...

A water tank open at the top is hemispherical at the bottom and cylindrical above it. If radius of the hemisphere is 12 m and the total capacity of the tank is `3312pi\ m^3` , then the ratio of the surface areas of the hemispherical and the cylindrical portions is (a) 1 : 1 (b) 3 : 5 (c) 4 : 5 (d) 6 : 5

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RS AGGARWAL-VOLUME AND SURFACE AREAS-All Questions
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