Question

Grayson's car used 2 gallons to travel 30 miles. How far can he travel on 3 gallons?

Answer 1

He can travel 45 miles with 3 gallons

Explanation:

If he traveled 30 miles with 2 gallons then that would mean each gallon lasted 15 miles, 30/2=15, therefore if there were 3 gallons he would travel 45 miles, 45/3=15

Answer 2

x = 45 miles

Explanation:

We can use ratios to solve

2 gallons 3 gallons

-------------- = --------------

30 miles x miles

Using cross products

2x = 3*30

2x = 90

Divide by 2

2x/2 = 90/2

x = 45 miles