Question

A hemispherical tank, full of water is emitied by a pipe at the rate of 25/7 liter per second. How much time it will take to empty half tank if the diameter of the base of the tank is meters.

Answer 1

The last line should be
How much time it will take to empty half tank if the diameter of the base of the tank is 3 meters

Answer 2

Hey mate..
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The solution is in the pic

Hope it helps !!