Workdone to blow a bubble of volume V is W. The workdone is blowing a bubble of volume 2 V will be

Answer

`root(3)(4)`

Explanation

`2 x ( 4//3) pi R^(3) = ( 4//3) pi r^(3) , r = 2 ^(1//3) R, W = 2 xx 4 pi r^(2) sigma, W. = 2 xx 4 pi ( 2 ^(2//3) R^(2)) sigma = root ( 3) ( 4) W`