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Question

Water is being pumped out through a circular pipe whose diameter is 7 cm if the flow of water is 72 cm per second how many litres of water being pumped out in h our

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Solution

According to question

Diameter of pipe = 7 Cm
Thus

Radius of pipe = r = 7/ 2 Cm
Let length of pipe be L

Rate of flow of water through pipe = 72 Cm per sec

Thus
in 1 sec water flowed = 72 Cm
Thus
in 60 sec = 72 * 60
in 1 hr = 72 * 60 * 60

So clearly
Volume of water flowed = pi r^2 H
= 22/7 * 49/4 * 72 * 60 * 60
= 9979.2 Liter

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