Question

A rectangular block is $5cm\times 5cm\times 10cm$ in size. The block is first immersed in water with $5cm$ side kept vertical. If it is then immersed with $10cm$ side kept vertical, what change will occur in the level in water?

• A. No change
• B. It will rise
• C. It will fall
• D. It may rise or fall depending on the density of block

Answer 1

The correct option is A No change

The volume of the block is $V=5\times 5\times 10=250c{m}^3$

When the block is immersed in water,

$\text{the volume of displaced water}=\text{volume of the block}\left(V\right)$

No matter how the block is immersed, the volume of the block is not going to change.

Therefore, the level of water will not change if the block is immersed with the $10cm$ side kept vertical.