A hemispherical tank full of water is emptied by a pipe at the rate of 25/7 litres per second. how much time will it take to empty half tank, if it is 3m in diameter ? (pie = 22/7)
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16
Answer:
16.5 min
Step-by-step explanation:
diameter of tank=3m
radius=3/2m
volume of tank=2×22/7×3/2×3/2×3/2
=99/4m^3
half volume=99/14×1/2=99/28
in litres
99/28×1000=99000/28
it can empty25/7 litres in 1 second
so it can empty 1 litres in 7/25 second
it can empty 99000/28 litres in
=99000/28×7/25
=990 sec
=990/60
=16.5 min
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