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Water is flowing at the rate of 15km/hr through a cylindrical pipe of radius 7cm into a rectangular tank which is 50m long and 44m wide. In how many hours

will the water level of the tank raise by 21cm


Time taken by water=15000x=length
radius= 7 /100m
volume= pie 73.5x =11×21x

volume of rectangular park=50×44×21/100

there fore
11×21x = 22 × 21
ie x= 2
the answer is two hours
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