Question

The length of a rectangle is 3 inches more than its width. If the perimeter is 42 inches, find the

dimensions of the rectangle.

Answer 1

width=9 inches

length=12 inches

Explanation:

The perimeter of a rectangle can be expressed as;

P=2(L+W)

where;

P=perimeter of the rectangle

L=length of the rectangle

W=width of the rectangle

In our case;

P=42 inches

L=w+3

W=w

replacing;

42=2(w+w+3)

42=2 w+2 w+6

42=4 w+6

4 w=42-6

4 w=36

w=36/4=9

w=9

width=9 inches

length=9+3=12 inches