Question

The specific gravity of a solid with respect to a liquid is $\frac{4}{5}$ and specific gravity of a liquid with a respect to water is $\frac{10}{9}$, then specific gravity of solid with respect to water is:

• A. $\frac{18}{25}$
• B. $\frac{8}{9}$
• C. 0.56
• D. 1.8

Answer 1

The correct option is B $\frac{8}{9}$

$R.D=\frac{\text{Density of solid}}{\text{Density of liquid}}=\frac{4}{5}$

$R.D_2=\frac{\text{Density of liquid}}{\text{Density of water}}=\frac{9}{10}$

Specific gravity of solid with respect to water $=R.D_1\times R.D_2=\frac{4}{5}\times \frac{10}{9}=\frac{8}{9}$