a water Reservoir is 12 metre long 9 metre wide and 6 high assuming that the reservoir is full if the water is being pumped out at the rate of 180 litre per minute in how many hours will the reservoir be empty?
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Answer:
volume of reservoir = l×b×h
= 12×9×6
= 648m^3
in litres
volume = 648× 1000
= 64800 litres
rate of pumping water = 180litres/min
so, minutes in pumping out 64800 liters of water
= 64800×1/180
= 360min
in hrs. time = 360/60
= 6hrs.
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