Patricia D. answered • 03/15/19

P.A.T.T.I. - P.atiently A.nd T.enderly T.utoring I.ndividuals

L = length and W= width.

If the length is 3 times the width, then L = 3W.

Using substitution, A = LW becomes A = (3W)W = 3W^{2}

since the area is 60, we have 60 = 3W^{2}

divide both sides by 3, and W^{2} = 20, and

W = sqrt(20) = 4.47 in

L = 3W= 3( 4.47 = 13.42 in