A cylindrical pipe has an inner diameter of 7 cm and water flows through it at 192.5 litres per minute. Find the rate of flow.
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Volume of water that flows per hour = (192.50 × 60) liters = (192.5 × 60 × 1000) cm3.
The inner radius of the pipe = 3.5 cm.
Let the length of the column of water that flows in 1 hour be h cm.
Then,227 × 3.5 × 3.5 × h = 192.5 × 60 × 1000
h= 300000 cm = 3 km
Hence, the rate of flow = 3 km per hour =0.05 km per minute