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Two blocks A and B made of iron and aluminum respectively have exactly the same weight. They are completely immersed in water and weighed. If the densities of iron and aluminum are $8000 k g / m^{3} a n d 2700 k g / m^{3},$ then

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ratio of apparent weights of A and B = 80/27

A and B will weigh the same as before

A will weigh more than B

B will weigh more than A

answer is A.

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Detailed Solution

$ρ_{A} > ρ_{B} \Rightarrow v_{A} < v_{B}, w_{a} = w - ρ V g \Rightarrow {(w_{a})}_{A} > {(w_{a})}_{B}$

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