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Question

A body of volume 100cm3 weighs 5kgf in air. It is completely immersed in a liquid of density 1.8×103kgm3. Find the weight of the body in liquid.

A
4.82kgf
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B
9.64kgf
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C
2.41kgf
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D
None of the above
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Solution

The correct option is A 4.82kgf
Weight of body in liquid = Actual weight - upthrust
Upthrust exerted =Vρg
Where, V= volume
ρ= density
g=acc. due to gravity

Upthrust=100×109m3×1.8×103kgm3×10

0.18kgf

So, Weight of body in liquid = Actual weight - upthrust
50.18=4.82kgf

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