Question

A fish tank is filled with water up to height $16.5$ inches. If now we put rocks in the tank, then the water height rises to $18$ inches.How many cubic inches of water do the rocks displace?

• A. $280$
• B. $420$
• C. $560$
• D. $980$

Answer 1

Answer: (B)

$420$

The volume of water displaced will be equal to the volume of water contained in between the final and the initial height.

It would be equal to $(18-16.5)\times 28\times 10=420$ cubic inch