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  1. A right circular cylinder is circumscribed about a hemisphere so that they share the same base. The ratio of the volumes of cylinder and hemisphere is
    1. 4 : 3
    2. 3 : 1
    3. 3 : 4
    4. 3 : 2
Correct Option: D


Radius of cylinder = radius of hemisphere = r units

∴ Required ratio = πr².r :
2
πr³
3

= 3 : 2


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