The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle? Choices:
A) 12 cm  B) 14 cm  C) 18 cm  D) 20 cm  E) 22 cm
2(l + b) = 5   b 1   2l + 2b = 5b   3b = 2l   b = 2 l   3   Then, Area = 216 cm2   l x b = 216   l x 2 l = 216   3   l2 = 324   l = 18 cm.   18 cm
<result>C</result>
The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?