Question

The length of a rectangle is four more than double the width. If the perimeter is 80 inches, find the dimensions.

The width is inches.

The length is inches.

Answer 1

Answer: width = 12 inches

length = 28 inches

Explanation:

l = 4 + 2w

Perimeter = 2 ( l + w )

80 = 2 ( 4 + 2w + w )

80 = 2 ( 4 + 3w )

80 = 8 + 6w

80 - 8 = 6w

72 = 6w

w = 72 / 6

width = 12 inches

length = 4 + 2 (12)

= 4 + 24

= 28 inches

checking

Perimeter = 2 ( 28 + 12 )

= 2 (40)

= 80 inches

correct