Question

The width of a rectangle is 2cm less than its length. The perimeter of the rectangle is 16cm. What are the dimensions of the rectangle.

Answer 1

Length is 5 cm and width is 3 cm

Explanation:

Width is w

Length is l

Perimeter is 2l + 2w

Perimeter is 16

w = l-2

16 = 2l + 2w

16 = 2l +2(l-2)

16 = 2l + 2l - 4

16 = 4l - 4

20 = 4l

5 = l

Substitute that back into w:

w = (5) - 2

w = 3