Water is flowing at the rate of 15km/hr through a cylindrical pipe of radius 7cm into a rectangular tank which is 50m long and 44m wide. In how many hours will the water level in the tank raise by 21cm

Answer 1

the area of the tank is 220m^2
So, you want to have a volume of 220*.21 = 46.2 m^3

15 km/hr = 4.167 m/s
The area of the pipe is pi*.07^2 = 0.01539m^2

So, the water is flowing in at 4.167*0.01539 = 0.06414 m^3/s

46.2 m^3 / (.06414 m^3/s) = 720 s = 12 min = 0.2 hr