Question 282695
let the length of the rectangle be x

the width is 1/2 *x

the perimeter is 2*L + 2*w

120= 2*x+ 2* (1/2 *x)

120 = 2x+x

120 =3x

120/3= x

40 =x

the width will be 1/2 of 40 = 20 feet