The area of a rectangle is 1568cm^2. If the length is twice as long as the width, what is the length of the rectangle?

Answer 1

Let w = the width

Let 2w = the length

A = lw

1568 = 2w(w)

1568 = 2w²

784 = w²

√784 = √w²

28 cm = w

2w = 56 cm