The ratio between the perimeter and the width of a rectangle is 5:1. If the area of the rectangle is 294 square centimeters, what is the length of the rectangle in centimeters?  Choose one: A) 19 B) 20 C) 21 D) 22 E) 23
Perimeter = 2(W+L) = 5W   3W = 2L   W = 2L/3   WL = 294   2L^2/3 = 294   L^2 = 441   L = 21 cm   The answer is 21.
<result>C</result>
The ratio between the perimeter and the width of a rectangle is 5:1. If the area of the rectangle is 294 square centimeters, what is the length of the rectangle in centimeters?