Question

the top of a rectangular table has an area of 21 square feet. the width of the table is 3 feet. what is the length of the table?

Explanation:

Step1: Recall area formula

The area formula for a rectangle is $A = l\times w$, where $A$ is area, $l$ is length and $w$ is width.

Step2: Rearrange formula for length

We can rewrite the formula as $l=\frac{A}{w}$.

Step3: Substitute values

Given $A = 21$ square - feet and $w = 3$ feet, then $l=\frac{21}{3}$.

Step4: Calculate length

$l = 7$ feet.

Answer:

7 feet