Question

Perimeter of a rectangle is $84$ cm.If its length is $24$ cm then what will be its breadth?

Answer 1

Given:length $=24$ cm

perimeter of rectangle$=2\times (l+b)$

$\Rightarrow 84=2\times (24+b)$

$\Rightarrow 42=24+b$

$\therefore b=42-24$

Hence $b=18$ cm