What are its dimensions?

1 ⤊

What are its dimensions?

The length of a rectangle is 40% more than its width. Its area is 560 square centimeters.

2007-01-07 10:09:56 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

4 answers

20x28

2007-01-11 09:53:17 · answer #1 · answered by Anonymous · 1⤊ 1⤋

The area of a rectangle is width (W) x length (L). In this case, L = 1.4W.

1.4W * W = 560
1.4W^2 = 560
W^2 = 560 / 1.4
W^2 = 400
W = 400^(1/2)
W = 20

We now know that W = 20, and L = 1.4 * 20 = 28

2007-01-07 10:17:47 · answer #2 · answered by X X 2 · 0⤊ 0⤋

let a be the length, b be the width

a = b(1+0.4) = 1.4b
a * b = 560

a = 1.4b
1.4b^2 = 560

a = 28
b = 20

2007-01-07 10:15:17 · answer #3 · answered by James Chan 4 · 0⤊ 0⤋

L = 1.4W
LW = 560
1.4W^2 = 560
W^2 = 400
W = 20
L = 28

2007-01-07 10:14:00 · answer #4 · answered by sahsjing 7 · 0⤊ 0⤋