The area of a rectangle is 12 sq.metres and it’s length is 3 times that of it’s breadth. What is the perimeter of the rectangle?

A. 14m
B. 18m
C. 4m
D. None of these

Explanation:

Let the breadth be x metres , then it’s length = 3x metres

=>3x × x =12

=> x2= 4

=> x =2 l=6m, b =2m

=> Perimeter = 2(6+2)m = 16m