A rectangular painting is three times as long as it is wide the area of the picture is 588inches. Find the dimensions of the painting

Question

A rectangular painting is three times as long as it is wide. The area of the picture is 588 in^{^2.} find the dimensions of the painting 

Answer 1

The length, L, is three timw as long as the width, W.  Then: L=3*W

 

The area is 588 square inches, ten LW = 588

Substitute for L, then 3*W*W = 3W^2 = 588

W^2 = 196

W=14 inches,

L=3*W=42 inches