NEET Physics Mechanical Properties of Fluids Questions Solved

If pressure at half the depth of a lake is equal to 2/3 pressure at the bottom of the lake then what is the depth of the lake

(a) 10 m                           (b) 20 m
(c) 60 m                           (d) 30 m

(b) Pressure at bottom of the lake = P0+hρg
Pressure at half the depth of a lake = P0+h2ρg
According to given condition
P0+12hρg=23(P0+hρg) 13P0=16hρgh=2P0ρg=2×105103×10=20 m

Difficulty Level:

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