Question

Water is being pumped out through a circular pipe whose internal diameter is 7cm if the flow of water is 72cm per second. How many litters of water are being pumped out in an hour​

Answer 1

Answer:

Step-by-step explanation:

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