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. What is the volume of the stone?

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

Answer 1

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

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 ml = 1 cu cm
$\therefore$ The volume of the stone = 5 ml
= 5 cu cm