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?  Choose the correct choice.
A) 12 cm  B) 14 cm  C) 18 cm  D) 20 cm  E) 15 cm
2(l+b)/b=5/1   2l+2b=5b   3b=2l   b=2/3l   Then, Area = 216 cm2   lx b=216   lx 2/3l=216   l2=324   l=18 cm   ANSWER: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?