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Question -

A cylindrical water tank of diameter 1.4 m and height 2.1 m is being fed by a pipe of diameter 3.5 cm through which water flows at the rate of 2 metre per second. In how much time the tank will be filled?



Answer -

Diameter of cylindrical tank = 1.4 m
∴ Radius (r) = 1.4/2 = 0.7 m
and height (h) = 2.1 m
∴ Volume of water in thetank = πr2h

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