L = length
W = width
L = 5W ---- Length is 5 times the width
A = LW= 125
first lets find L and W
A = LW = 125-----LW is the formula for area of a rectangle
we know L = 5W
we'll plug in 5W for L
A = (5W)W = 125
A = 5W^2 = 125
W^2 = 125/5
W^2 = 25
Take the squareroot
W = 5
L = 5W
L = 5 * 5
L = 25
P = Perimeter = 2(L + w) ----- formula for perimeter of a rectangle
P = 2(25 + 5)
P = 60