Question

The length of a rectangle is 40 cm. If its breadth is half the length, the perimeter is

• A. 1200 cm
• B. 1.2 cm
• C. 120 m
• D. 120 cm

Answer 1

The correct option is D 120 cm

Given length $l=40cm$
The breadth is half of the length.
$\Rightarrow b=\frac{l}{2}$
$\Rightarrow b=20cm$

Perimeter of the rectangle, P $=2(l+b)$
$\Rightarrow P=2(40+20)$
$\Rightarrow P=2\left(60\right)$
$\Rightarrow P=120cm$

$\therefore$ Perimeter of the rectangle is 120 cm.