A pipe of internal diameter 21 cm is connected to a cylindrical tank which is 12 m diameter & 2 m deep. If water flows is the pipe at the rate of 6 km/hr, find the time taken for filling the tank.
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Answer:
Volume of tank = π 600×600×200 cm^3
Volume of water flowing in 1 second in the tank =
(6×100000/3600)×π(21/2)×(21/2) cm^3
Let time taken to fill the tank = t
Then (6×100000/3600)×π×(21/2)×(21/2)×t =
π×600×600×200
t = 160/49 hr
= 3 hr about 16 minute Ans
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