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A body weight 20 N in water and its rela...

A body weight 20 N in water and its relative density is 3. Find the weight of the body in air.

Text Solution

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Let `W_1` be the weight of the body in air and `W_2` be its weight in water.
`therefore W_2=20` N
R.D. of the body= 3
`therefore(W_1)/(W_1-W_2)=3`
`W_1/(W_1-20)=3rArrW_1=30` N
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