The reading of a spring balance when a block is suspended from it in air is 60 N. This reading is changed to 40 N when the block is submerged in water. The specific gravity of the block must be therefore :

Options

A. 3
B. 2
C. 6
D. `3/2`

Answer

A

Explanation

Relative density`=("wt. of body in air")/("loss of weight in water")`
`=(60)/(60-40)=3`
Thus correct choice is (a).