SOLUTION: Find the cost of plastering the walls of a room 18 ft long, 25 ft 6 in. wide, and 12 ft high. Subtract 160 ft^2 for windows and doors. The cost is $2.20 per square foot. $ = ?

Algebra ->  Surface-area -> SOLUTION: Find the cost of plastering the walls of a room 18 ft long, 25 ft 6 in. wide, and 12 ft high. Subtract 160 ft^2 for windows and doors. The cost is $2.20 per square foot. $ = ?      Log On


   



Question 1078210: Find the cost of plastering the walls of a room 18 ft long, 25 ft 6 in. wide, and 12 ft high. Subtract 160 ft^2 for windows and doors. The cost is $2.20 per square foot.
$ = ?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Calculate the total surface area,
SA=2%2A18%2A12%2B2%2A25%261%2F2%2A18
SA=432%2B918
SA=1350ft%5E2
Subtract out the windows and doors,
SA%5Bp%5D=SA-160
SA%5Bp%5D=1350-160
SA%5Bp%5D=1190ft%5E2
Multiply by the cost per square foot,
C=SA%5Bp%5D%2A2.2
C=1190%2A2.2
Work that out for the final answer.