I need to know the formula and answer to solve this problem

Question

You want to paint your bedroom. The walls are 10 feet high and the room is a rectangle that is 12 feet by 14
feet. You find this fancy paint that says a 1 gallon can will cover 20 square meters.

a. How many 1 gallon cans of paint will you need?

b. If a can costs $23.95, how much will it cost to repaint your room?

Answer 1

Determine surface area:

2(12)(10) + 2(14)(10)

 

1 m² = 10.7639 ft²

20 m² = 215.278 ft²

 

Divide surface area by 215.278

Result is number of gallons

 

Multiply number of gallons by $23.95

Product is the cost.