Question

Problem A rectangle has a width of 10 centimeters. The rectangle's length is 4 times its width. What is the perimeter of the rectangle?

Answer 1

Let W = 10 cm and L = 4W = 40 cm

Then P = 2L + 2W = 2(4W) + 2(W) = 10W = 100 cm

Check: Does 2(10 cm) + 2(40 cm) = 100 cm? YES