Q. 35

Water is flowing

Answer :

For pipe, r = 1cm


Length of water flowing in 1 sec, h = 0.7m = 7cm


Cylindrical Tank, R = 40 cm, Let the rise in water level = H


Volume of water flowing in 1 sec =πr2h = π x 1 x 1 x 70 =70π


Volume of water flowing in 60 sec = 70π x 60


Volume of water flowing in 30 minutes = 70π x 60 x 30


Volume of water in Tank = πr2H = π x 40 x 40 x H


Volume of water in Tank= Volume of water flowing in 30 minutes


π x 40 x 40 x H = 70π x 60 x 30


H = 78.75cm


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