# A car uses 15 gallons of gaz to travel 300 miles. How many gallons are needed for this car to travel a distance of 430 miles?

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Expert Answers

justaguide | Certified Educator

The car needs 15 gallons of gasoline to travel 300 miles.

For 1 mile it needs 15/300 gallons.

If the car has to cover 430 miles the gallons of gasoline needed is 430*(15/300) = 21.5

**The car needs 21.5 gallons to travel 430 miles.**

Student Comments

giorgiana1976 | Student

To determine how many gallons are needed for the car to travel a distance of 430 miles, we'll have to use the rule of three.

15 gallons...........................300 miles

x gallons..............................430 milesWe'll cross multiply:

x*300 = 15*430x = 15*430/300

x = 15*43/30x =43/2

x = 21.5 gallons**Therefore, the car needs 21.5 gallons to travel 430 miles.**