William measures the dining room ceiling to see how much molding he will need to go around the perimeter of the rooms ceiling. william measured the length of the dining room to be 8 3/4 ft and the width to be 10 7/8 ft. how much molding does william need for the dining room ceiling?

From the information given, the shape of the room is not mentioned but we know from the dimensions that the room is not a square. If we assume the room is rectangular, then we can find out the perimeter of the ceiling

P = 2w + 2l

where P is perimeter, w is width and l is length

8 3/4 = 8.75 written as a decimal fraction, and 10 7/8 = 10.875

P = 2 (8.75) + 2 (10.875)

P = 17.50 + 21.75

P = 39.25 ft

Since we have not been given the unit and measure of molding needed per a given area, we can conclude by stating that William will need enough moulding to cover 39.25 ft