Question

If P denotes perimeter of a rectangle,$l$ denotes its length and $b$ denotes its breadth,find:
(i) $l$,If $P=38cm$ and
$b=7cm$

Answer 1

Step 1: Finding the length

We have:​
Perimeter of the rectangle $\left(P\right)=3.6cm$ and
Breadth of the rectangle $\left(b\right)=7cm$​

The perimeter of the rectangle is given by $P=2(Length+Breadth)$
$38=2(l+7)$ ​
$38=2\times l+14$ ​
$38-14=2\times l$
$24=2\times l$ ​
$l=\frac{24}{2}=12cm$
Therefore, the length of the given rectangle is 12 m.​