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Question -

From a tap of inner radius 0.75 cm, water flows at the rate of 7 m per second. Find the volume in litres of water delivered by the pipe in one hour.



Answer -

Inner radius of a tap = 0.75 cm
Speed of flow of water in it = 7 m/s
Time = 1 hour
∴ Length of flow of water(h)
= 7 x 60 x 60 m = 25200 m
∴ Volume of water = πr2h

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