Question

An aquarium can be modeled as a right rectangular prism and it can hold 980 cubic inches of water when it is full. Its width is 7 in and height is 7 in. Find the length of the aquarium in inches. Round your answer to the nearest tenth if necessary.

Answer 1

Given:

Volume of the prism is 980 cubic inches.

Width is 7 in and height is 7 in.

Required:

To find the length of the prism.

Explanation:

The volume of the right rectangular prism is given by,

$V=lwh$

Therefore,

$\begin{gathered} 980=l\times7\times7 \\ \\ 980=49l \\ \\ l=\frac{980}{49} \\ \\ l=20in \end{gathered}$

Final Answer:

Length is 20 inches.