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Find the work done in lifting a stone of...

Find the work done in lifting a stone of mass 10 kg and specific gravity 3 from the bed of a lake to a height of 6 m in water.

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Mass of stone = 10kg, Specific gravity = `(d_(s))/(d_(w)) = 3`
`"W=mgh"(1-(d_(w))/(d_(s)))=10xx9.8xx6xx(1-(1)/(3))`
`W=98xx6xx(2)/(3)=392j`
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