Question

How many gallons of paint would be needed to paint a two-story house 40ft long and 30ft wide?

Answer 1

The surface area of the house is 1,200 sq ft. One can of paint has 400 sq ft of paint in it. It would take 3 gallons of paint to paint the house.

Answer 2

The answer is approx 3 gallons.

Explanation:

On a standard basis, one gallon can of paint will cover up to 400 square feet area.

Given dimensions of the house are = 40 feet by 30 feet

Area =
`40*30=1200` square feet

Now we know that 400 square feet of area can be covered in 1 gallon of paint.

So, 1200 square feet area can be covered by =
`(1200)/(400)` = 3 gallons of paint.

Hence, approx 3 gallons of paint will be used.