A rectangular water tank with a dimension of 120 m × 90 m × 8.5 m can be emptied by a pipe with a square cross section of side 25 cm. If rate of water flow through the pipe is 20 km/h, then how much time it will take to be emptied?
1
5.2 days
2
3.06 days
3
4.03 days
4
4.5 days