The area of a rectangle is 21 square inches. If the length is 2 times the width, then find the dimensions of the rectangle.

Question

Round off the answer to the nearest hundredth. 

Answer 1

Let L = length and W = Width

The problem says L = 2W

and

Area = LW = 21

Substitute

2W² = 21

W² = 10.5

W = 3.24

L = 6.48