Question

The length of a rectangle is twice the width. the area is 30 yds^2. find the length and the width.

Answer 1

width = x
length = 2x

x * 2x = 30
2x² = 30
x² = 15
x = √15 ≈ 3.87 yds  ←  width 

length = 2x = 2√15 ≈ 7.74 yds