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CBSE Class 10 Answered

A hemisphere tank full of water is emptied by a pipe at the rate of 25/7 liters per sec how much time will it take to make the tank half empty, if the tank is 3m in diameter
Asked by Surabhi Soman | 01 Mar, 2013, 11:32: AM
answered-by-expert Expert Answer

radius of hemispherical tank = 3/2m

volume of tank = 2/3*22/7*3/2*3/2*3/2 = 99/14 m3 =99000/14L (1m3= 1000L)

half the tank = i.e 99000/14 * 1/2 = 99000/28 L

now,in 1 sec = 25/7 L of water is emptied

Required time

= 99000/28 / 25/7

= 99000/28 * 7/25

= 990 sec

Answered by | 01 Mar, 2013, 02:45: PM

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