Question

Josephine wants to put wallpaper border around the ceiling. the lenth of the border is 8 and 1/2 and the wisthn is 10 and 9/12. what is the perimeter.

Answer 1

Assuming the ceiling has a rectangular shape, the perimeter is the sum of the lengths of all the sides, hence twice the sum of length and width.

2(8 1/2 + 10 9/12) = 2(18 +6/12 +9/12)

= 2(18 +15/12)

= 2(19 3/12)

= 2(19 1/4)

= 38 1/2 . . . . . the room's perimeter