A piece of solid weighs 120 g in air, 80 g in water and 60 g in a liquid. The relative density of the solid and that of the liquid are respectively

Options

A. 3,2
B. `2,(3)/(4)`
C. `(3)/(2),2`
D. `3,(3)/(2)`

Answer

D

Explanation

Relative Density
`=("Weight in air")/("Weight in air-Weight in water")`
R.D. `=(120)/(120-80)=(120)/(40)=3`
R.D. `=("Weight in air-Weight in liquid")/("Weight in air-Weight in water")`
R.D. `=(120-60)/(120-80)=(60)/(40)=(3)/(2)`