A container of large surface area is fil...

A container of large surface area is filled with liquid of density `rho`. A cubical block of side edge a and mass M is floating in it with four-fifth of its volume submerged. If a coin of mass m is placed gently on the top surface of the block is just submerged. M is

`4m//5`

`m//5`

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The correct Answer is:

`Mg=(4)/(5)Vrhog" "....(1)`
`(m+M)g=Vrhog" "....(2)`
From (1) `&` (2) `M=4m`

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