

Let breadth of the rectangular lawn is b
Given length of the rectangular lawn is 15 m
Now area of the rectangular lawn = 225
=> length*breadth = 225
=> 15*b = 225
=> b = 225/15
=> b = 15
Perimeter of the rectangular lawn = 2(length + breadth)
= 2*(15 + 15)
= 2*30
= 60 m
