A rectangle has an area of 180 cm${}^2$ and one side is 15 cm. Find its perimeter.

Step-by-step solution

1. Let breadth be $b$. (Unknown)
2. Given area $A=180$ cm${}^2$ and length $l=15$ cm. (Given)
3. Use area formula $A=l\times b\Rightarrow b=A/l=180/15=12$ cm.
4. Compute perimeter $P=2(l+b)=2(15+12)=2\times 27=54$ cm.
5. Result: perimeter is $54$ cm.

Concept tested: Perimeter of rectangle

Published 10 October 2026 · How this solution was prepared and checked