Question

The length of a rectangle is six times its width.

If the perimeter of the rectangle is 70 cm, find its length and width.

Answer 1

Length = 30

Width = 5

Explanation:

So the formula for perimeter is

P = 2L+2W

And we know that:

L = 6W

So then we put in all the information that we do know

70 = 2(6W)+2W

And pop that into a calculator and you get W=5

So now we put that information into L = 6W to get:

L = 6×5

L = 30