Basic Maths and Units and DimensionsHard
Question
The volume of an air bubble becomes three times as it rises from the bottom of a lake to its surface. Assuming atmospheric pressure to be 75 cm of Hg and the density of water to be 1/10 of the density of mercury, the depth of the lake is :-
Options
A.5 m
B.10 m
C.15 m
D.20 m
Solution
WBCOB = - Area of triangle BCO = - 
WAODA = + Area of triangle AOD = +
WAODA = + Area of triangle AOD = +
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