The length of a rectangle is 40 cm. If its breadth is half the length, the perimeter is 100 cm.

True

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False

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Solution

The correct option is B False
Given, the breadth is half of the length.
$∴ b = \frac{l}{2}$
Given length $l = 40 c m$
$\Rightarrow b = 20 c m$

Perimeter of a rectangle $= 2 (l + b)$
$\Rightarrow 2 (40 + 20)$
$\Rightarrow 2 (60)$
$\Rightarrow 120 c m$

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