Madhya Pradesh Police Exam Model Paper 1

Given
Area of a rectangle is $27{\mathit{m}}^2$
Length is 3 times of its breadth
Concept
Area of rectangle = Length × Breadth
Perimeter of rectangle = 2 × (Length + Breadth)
Calculation
Let breadth of rectangle = x meter
From question
Length = $3\times \mathit{x}=3\mathit{x}$
Now,
$\Rightarrow 27=3\mathit{x}\times \mathit{x}$
$\Rightarrow 27=3{\mathit{x}}^2$
$\Rightarrow {\mathit{x}}^2=27/3$
$\Rightarrow {\mathit{x}}^2=9$
$\Rightarrow \mathit{x}=3$
Breadth = 3 meter
Length $=3\times 3=9$ meter
Now,
⇒ Perimeter $=2\times \left(9+3\right)$
⇒ Perimeter $=2\times 12$
⇒ Perimeter = 24 meter.
∴ Perimeter = 24m