Question

Jazmyn uses 2 gallons of paint to paint 5 walls. He uses 4 gallons of paint to paint 10 walls. How many gallons of paint does he use per wall?

Answer 1

2/5 gallons

Explanation:

If it takes 2 gallons of paint to paint 5 walls, then the amount of gallons used per wall can be calculated by comparison

`5 walls = 2 gallons \\ 1 \: wall = x \: gallons \\ by \: cross \: multiplication \\ 5 * x = 2 * 1 \\ 5x = 2 \\ x = (2)/(5)`

Hence, 2/5 gallons of paint is used per wall.