a water tank is a cubiod with dimensions 40cm by 90cm by 70 cm. the tank is initially empty and is then filled with water which flows from a pipe of cross sectional area 1.2 sqcm at a speed of 3.5m/s. calculate the timein minutes that it takes to fill the tank completely.

Answer 1

well, the volume of water flowing in every second is

1.2cm * 350cm/s = 420 cm^3/s

Now divide the volume of the tank by the inflow rate to get the time (in seconds)