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A cylindrical tank full of water is emptied by a pipe at the rate of 225 litres per minute.ow much time will it take to empty half the tank,if the diameter

of its base is 3m and it is of height 3.5m?


Volume of cylindrical tank
= πr²h = 22/7×(3/2)²×3.5 = 24.75 m³ or 24750 litres (∵ 1m³=1000 litres)
Volume of half of the hank (Volume to be emptied) 
= 24750/2 =  litres
Time needed to empty half the tank =  12375/225 = 55 minutes   Ans.
2 4 2
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