Question

Find the area of the rectangle whose sides are $3\text{cm}$ and $4\text{cm}$.

Answer 1

• The area $A$ of the rectangle with length $l$ and width $w$ is given by, $A=l\times w$.

Step 1: Substitute $3$ for $l$ and $4$ for $w$ into $A=l\times w$ and find the area of the rectangle.

$\begin{array}{rcl}A& =& 3\times 4\\ & =& 12{\text{cm}}^2\end{array}$

Hence, the area of the rectangle is $12{\text{cm}}^2$.