Water flows into a large tank with flat bottom at the rate of 0.7 × 10-4 m3 s-1. Water is also leaking out of a hole of area 0.5 cm2 at its bottom. If the height of the water in the tank remains steady then the height is:
1
10.0 cm
2
15.0 cm
3
5.1 cm
4
7.5 cm