Question

A hemispherical tank of radius 7/4
m is full of water. It is connected with a pipe which empties
it at the rate of 7 litres per second. How much time will it take to empty the tank completely?​

Answer 1

Answer:Radius = 1 3/4 = 7 / 4 m

Volume = 2/3 πr³

= 2 / 3 × 22 / 7 × (7 / 4)³

= 2 / 3 × 22 / 7 × 343 / 64

= 11.2291667 m ³

= 11229.1667 litres

Water that falls in 1 sec = 7 Litres.

Time taken to empty the tank with 11229.1667 litres of water = 11229.1667 litres ÷ 7

= 1604.16667 sec

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