89 A room is 7'6 wide by 9'0 long with a ceiling height of 8'0. One gallon of flat paint will cover approximately 400 square fee of wall. The number of gallons of this paint required to paint the wall?

Answer 1

1 gallon

Answer 2

Ignoring any allowance for doors and windows then the wall area of this square room is : 4 x 20 x 12 = 960 sq feet.

As three coats are being applied then the total area = 3 x 960 = 2880 sq ft.

1 gallon of paint covers 465 sq ft therefore 2880 sq ft requires 2880/465 = 6.1935 gallons.

1 gallon of paint costs $20. Assume the paint is sold in 1 gallon tins then 7 tins will be required at a cost of 7 x 20 = $140.

NOTE : If the ceiling is also being painted then this has an area of 20 x 20 = 400 sq ft.

Wall + Ceiling area = 960 + 400 = 1360 sq ft. Paint area = 3 x 1360 = 4080 sq ft.

Paint required = 4080/465 = 8.7742 gallons. Therefore 9 tins costing $180.