Answer :

Given,


Diameter of the cylindrical pipe = 7 cm


Radius of the pipe = 3.5 cm


Volumetric flow rate = 192.5 l/min


Flow rate =


Area = pi × r2 = 3.14 × 3.5 × 3.5 = 38.5 cm2


Since 1 l = 1dm3 = 1000 cm3


Volumetric flow rate = 192.5 × 1000 cm3/min


So,


Flow rate = = 5000 cm/min


Flow rate in km/h = 5000 cm/min = 5000 × 0.00001 km/( h) = 3 km/h


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