a room is 20 feet long, 18 feet wide, and 8 feet tall.if keiko paints the walls and ceiling, how much surface area will she cover?

Question

What is the surface area minus the floor

 

Answer 1

Assuming it has four walls: 

 

Surface area of the walls = 2*(20*8) + 2*(18*8) = 608 square ft

Surface area of the ceiling= 20 *18 = 360 square ft

 

Total surface area= 608+360= 968 sq ft