Question

What is the length of a rectangle that has a width of 2.5 centimeters and an area of 20.5 square centimeters?

Answer 1

Using the formula

$A = w \: l$

$area = 20.5 \: {cm}^{2} \\width = 2.5 \: cm$

$Solving \: for \: l:$

$\: \: \: \: \: \: l = \frac{a}{w}$

$\: \: \: \: \: \: \: \: \: = \frac{20.5}{2.5}$

$\: \: \: \: \: \: \: \: \: \: = 8.2 \: cm$

$Therefore \: the \: length \: of \: the \\ rectangle \: is \: 8.2cm.$