Question

A block weighs 15 N in air and 12 N when immersed in water. The specific gravity of the blocks is

• A. 0.8
• B. 0.25
• C. 5/4
• D. 5

Answer 1

The correct option is D 5

Specific gravity or relative density is mass in air/mass in air$-$mass in water$.$

$=15/15-12$

$=15/3$

$=5$

therefore, the specific gravity or relative density in $5$

Hence,

option $\left(D\right)$ is correct answer.