Question

The width, w, of a rectangle is equal to 3/7 of its length, l. The length, l, of the rectangle is 21 inches.

What is the perimeter of the rectangle?
What is the area of the rectangle, in square inches?

Answer 1

l = 21 inches
w = 3/7(21) or 9 inches

P = 2l + 2w
P = 2(21) + 2(9)
P = 42 + 18 = 60 inches

A = l * w
A = 21 * 9 = 189 square inches