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Questions  

A triangular lamina of area A and height h is immersed in a liquid of density ρ  in a vertical plane with its base on the surface of the liquid. The thrust on the lamina is

a
12A ρgh
b
13A ρgh
c
16A ρgh
d
23A ρgh

detailed solution

Correct option is B

Thrust on lamina = pressure at centroid × Area                   =hρg3×A=13A ρgh

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