Question 286483
Let l = length, w=width

l=2w (because the length is twice as long as the width)

The perimeter can be expressed by:

P=2w+2l

Substitute P=48 and l=2w into the equation:

48 = 2w + 2(2w)
48 = 2w + 4w
48 = 6w
w=8

The width is 8cm and the length is 16cm.