Question

Water is flowing at the rate of 15 km/h through a pipe of diameter 14cm

Answer 1

what is to be find there

Answer 2

water is flowing at the rate of 14km/hr

hence the length of the pipe is 15km = 15000m

diameter of pipe = 14cm

radius = 7cm = 7/100 m

dimensions of pond = 44m × 50m × 21cm

                                 =44m × 50m× 21/100m

ATQ, vol. of pond = vol. of pipe × t         ( time taken to fill 21cm of pond = t )

lbh = 1/3 πr²h

44×50×21/100 = 1/3× 22/7 × 7/100×7/100×15000 ×t

t = 2 hrs