Question

Water flows through a cylindrical pipe of diameter 4.2cm at a speed of 50m/minute. Calculate the volume of water delivered by pipe per minute in litres.

Answer 1

C.S.A=²²/₇ × ^4.2/₂ × ^4.2/₂ =13.86cm²
 Rate=50m/min =5000cm/1min
            13.86 × 500   l/min
                  1000
        =69.3litres per minute