For Monica’s 14th birthday, she wants to make over her bedroom the first phase and the bedroom makeover is Painting her room if Monica‘s room is 20 feet long 15 feet wide and 9 feet high. Find the surface area of the room that you are going to paint include the floor and ceiling.
To find the surface area of the room that needs to be painted, we need to add up the surface area of all the walls, the floor, and the ceiling.
Walls:
2(20 ft x 9 ft) + 2(15 ft x 9 ft) = 360 sq ft
Ceiling:
20 ft x 15 ft = 300 sq ft
Floor:
20 ft x 15 ft = 300 sq ft
Total surface area = 360 sq ft (walls) + 300 sq ft (ceiling) + 300 sq ft (floor) = 960 sq ft
So, the surface area of Monica's room that needs to be painted, including the floor and ceiling, is 960 square feet.