Question

The length of a rectangle is 3 times the width. the perimeter is 96cm. find the length and width.

Answer 1

Let it's width be x
then, it's length = 3x

perimeter of a rectangle = 2 (l+b)
96 = 2 (3x+x)
96 = 8x
12 = x


so the widthe of that rectangle = 12cm and it's length = 3 (12) = 36cm.