If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm", the pressure at a depth of 50 m below the oil surface will be
A. 2 meters of water column
B. 3 meters of water column
C. 5 meters of water column
D. 6 meters of water Column
Answer: Option D

The oil depth should be 5 m, not 50 m.
D. 6 meters of water Column
In Question 50m below is wrongly print or accoding to 50m Answer is 42 m of water column
or in place of 50m to 5m answer is 6m
Explanation
Psurface of oil column+row(oil)*g*h(below the oil surface)=row(water)*g*H(water column Lenth)
.2*10000*9.81+800*9.81*5=1000*9.81*H
H=6m
60meter