Question

The volume of water in a measuring jar is 15 mL. When a stone is immersed in the water, the water level rises to 20 mL. The volume of the stone is .

• A. $8{\text{cm}}^3$
• B. $5{\text{cm}}^3$
• C. $4{\text{cm}}^3$
• D. $6{\text{cm}}^3$

Answer 1

The correct option is B $5{\text{cm}}^3$

Initial water level on the jar = 15 mL

Water level after the stone is added = 20 mL

The water level rises due to the stone which was immersed. This increase in water level equals to the volumes of the stone.

i.e., Volume of the stone
= Final water level - Initial water level
= 20 mL - 15 mL
= 5 mL

But, we know that $1\text{mL}=1{\text{cm}}^3.$
$\therefore$ The volume of the stone is $5\text{mL}=5{\text{cm}}^3.$