The area of a rectangle is 216 m2 and its length is 6 times its breadth. What is the perimeter of the rectangle?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 84 m
Area of a rectangle \(=\) length \(\times\) breadth, and perimeter \(=2(\)length \(+\) breadth\()\).
Let the breadth be \(b\) m; then the length is \(6b\) m
\(6b\times b=216\), so \(b^2=36\) and \(b=6\) m
Length \(=6\times6=36\) m
Perimeter \(=2(36+6)=84\) m