1.

A solid body is floating in water with 5/6th of its volume inside the water. What fraction of its volume will be outside if it ftoats in a liquid of specific gravity 1.6?

Answer»

SOLUTION :If V m`""^(3)` is the volume of the BODY, then
Volume of body inside water =`5/6V m^(3)`
Weight of body = Weight of water displaced `=5/6 V xx 10^(3) xx G .......(i)`
When the body floats in a liquid of specific GRAVITY 1.6, let V. be its volume outside the liquid.
Then, volume of liquid displaced =V-V.
Weight of body = weight of liquid displaced
`=(V-V.) xx 1.6 xx 10^(3) x g ........(ii)`
Comparing (i) and (ii), we get `5/6 V xx 10^(3) xx g=(V-V.) xx 1.6 xx 10^(3) xx g`
`(V-V.) xx 1.6 xx 10^(3) xx g=5/6 V xx 10^(3) xx g`
`rArr (V-V.)/V=5/6 xx 10/16=(25)/(48)`
`rArr 1-(V.)/V=(25)/(48)`
`rArr (V.)/(V)=1-(25)/(48)=(23)/(48)`


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