*Water flows through a 7cm pipe at the rate of 4m/s.how many cm³ of water flow through the pipe in one second *

Diameter of pipe is D = 7 cm.

Cross sectional area of pipe is A= pi.(D^2)/4 cm^2

A = pi*49/4 = 38.48 cm^2

Water flows at v = 4 m/s

Water flow rate is Q = Av = 38.48 * 4 = 153.94 cm*3/s

**Q = 154 cm^3/s** = 154 * 10^(-3) litres/s = 0.154 litre/min

**Q = 0.154 l/s**

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