Madhya Pradesh Police Exam Model Paper 1

Given
Area of a rectangle is 27m2
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×x=3x
Now,
⇒27=3x×x
⇒27=3x2
⇒x2=27/3
⇒x2=9
⇒x=3
Breadth = 3 meter
Length =3×3=9 meter
Now,
⇒ Perimeter =2×(9+3)
⇒ Perimeter =2×12
⇒ Perimeter = 24 meter.
∴ Perimeter = 24m