Question

The area of an 19-cm-wide rectangle is 437 cm. What is its length?

Answer 1

The area of a rectangle is equal to:

$\text{Area = Width }\cdot\text{ length}$

In this case, we know that the area is equal to 437 cm^2 and the width is 19 cm, so we can replace the values and get:

$437cm^2=(19\operatorname{cm})\cdot(length)$

So, we can solve for length dividing both sides by 19 cm as:

$\begin{gathered} \frac{437cm^2}{19\text{ cm}}=\frac{(19\operatorname{cm})}{19\operatorname{cm}}\cdot(length) \\ 23\text{ cm = length} \end{gathered}$

Therefore, the length of the rectangle is 23 cm

Answer: 23 cm