Question

The perimeter of a rectangle is fifty centimeters. The length of the rectangle is twenty centimeters. What is the width of the rectangle?

thirty centimetres

fifteen centimetres

ten centimetres

five centimeters

Answer 1

Perimeter = length + length + width + width
P = 2 * l + 2 * w
50 = 2 * 20 + 2 * w

Answer 2

w=*

Answer 3

8

Answer 4

50 = 40 + 2 * w
50 - 40 = 40 - 40 + 2 * w
10 = 2 * w

Answer 5

10cm?

Answer 6

10 = 2 * w
10 / 2 = 2 * w / 2
w = 5

Answer 7

Thank you!

Answer 8

No problem!