Question

the length of a rectangle is 4 times its width. if the perimeter of the rectangle is 100cm, find its length and width

Answer 1

l = 4w

4w + 4w + w + w = 100

w = 10

If the width is 10, then the length has to be 40.

4(10) + 4(10) + 10 + 10 = 100

40 + 40 + 10 + 10 = 100

100 = 100