A rectangle is four times as long as it is wide. The perimeter of the rectangle is 100cm. Find the dimensions of the rectangle.

Answer 1

P = 2(L+W)

100 =2(4W+W) = 2(5W) = 10W

10W = 100

W = 100/10 = 10

Width = 10 cm

Length = 4(10) = 4 cm

Perimeter = 2(10+40) = 2(50) = 100 cm