Question

Find the length of a rectangular table, if the perimeter is $95$ cm and width $42$ cm.

Answer 1

Given width of rectangle $=42cm$

perimeter of rectangle $=95cm$

Using formula

perimeter = 2(length + width)

$p=2l+2w$

$2l=p-2w$

$l=\frac{p-2w}{2}$

$l=\frac{p}{2}-w$

$l=\frac{95}{2}-42$

$l=47.5-42$

$l=5.5cm$

$\therefore$ Length of a rectangle table $\left(l\right)=5.5cm$