Question

A hemispherical tank , full of water , is emptied by a pipe at the rate of 25/7 litres per second. How much time will it take to empty half the tank if the diameter of the base of the tank is 3 m ?

Answer 1

Hey mate..
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The solution is in the pic.

Hope it helps !

Answer 2

Answer:

989 seconds

Step-by-step explanation:

Radius =1.5m

Volume of the tank = (2/3)πr³

=(2/3)(3.14)(1.5)³

=7.065m³

=7065 L

Time taken to half the tank at the rate of 25/7 L/s

=(1/2)(7065)(25/7)

=989 seconds