A matallic block weighs `15N` in air. It weights `12N` when immersed in water and `13 N` when immersed in another liquid. What is the specific gravity of the liquid?

Options

A. `1//3`
B. `2//3`
C. `12//13`
D. `13//15`

Answer

B

Explanation

`(sigma)/(rho_w) = (15)/(15-12) , (sigma)/(rho_1) = (15)/(15-13)`
`implies (rho_l)/(rho_w) = 2/3`.