Question

the length of a rectangle is three times its width. if the perimeter of the rectangle is 48 cm, find its area

Answer 1

ok, so L=3w

so your equation should be 2(3w)+2w=48

Answer 2

w=6?

Answer 3

and L=18?

Answer 4

yeap

Answer 5

and the area is 108

Answer 6

yeap

Answer 7

\(\bf length = l\qquad width = w\\
length = 3w\\ \quad \\ \quad \\
perimeter = 48 = 2l+2w = 2(3w)+2w\qquad thus\\ \quad \\
48 = 2(3w)+2w\)

Answer 8

Yea. :)