Question

water is being pumped out through a circular pipe whose internal diameter is 7 cm. If the flow of water is 12 cm/s, how many litres of water is being pumped out in an hour? ​

Answer 1

here, radius = 7/2 cm

so volume of water pumped in one hour = πr^2h(time)

=1663200 cm^3 = 1663.2 litres