The density of an air bubble decrease by `x%` as it raises from the bottom of a lake to tis surface. The water berometer reads `H`. The depth of lake is

Explanation

`P_(1)V_(1) = P_(2)V_(2)`
`h = H((V_(2))/(V_(1)) - 1) = h((d_(1))/(d_(2))-1) = H((d_(1) - d_(2))/(d_(2)))`
`:. d_(1) - d_(2) = x, d_(2) = d_(1) - x = 100 - x`
`(Deltad)/(d) xx 100 = x , h = H ((x)/(100 - x))`