Question

A car can travel 135 miles with 5 gallons of gasoline. At this rate, how much gallons of gasoline the car needs to travel 675 miles?

Answer 1

25 gallons

Explanation:

Given

135 miles to 5 gallons

Required

Determine the number of gallons for 675 miles

From the question, number of miles is directly proportional to number of gallons:

So, we have:

`135\ miles = 5\ gallons`

and

`675\ miles = x`

Where x represents the number of gallons for 675 miles

Cross Multiply:

`135 * x = 675 * 5`

`135x = 3375`

Make x the subject

`x = 3375/135`

`x = 25`

Hence, the car needs 25 gallons