A body weighs 20 gf in air and 18 gf in water. Calculate relative density of the material of the body.



Weight of the solid in air (W1) = 20 gf

Weight of the solid in water (W2) = 18 gf

RD of body = W_1\over W_1 - W_2

= 20\over 20 - 18 = 20\over 2 = 10

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