A square surface 3 m × 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is

A square surface 3 m × 3 m lies in a vertical line in water pipe its

1.	A square surface 3 m × 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is
A.	,000 kg
B.	3,500 kg
C.	8,000 kg
D.	7,000 kg
Answer» C. 8,000 kg