Question 91670

Let x=distance traveled on 20 gal

One approach is to set up a simple ratio: 15 is to 240 as 20 is to x and this is written as follows:

15/240=20/x  cross multiply (actually we are multiplying both sides by 240x)

15x=240*20=4800  divide both sides by 15
x=320 mi------------------------------------distance travelled on 20 gal

Another approach would be to determine the mileage the car gets in miles/gal:

If the car goes 240 mi on 15 gal, then it goes 240/15 or 16 mi on 1 gal.

Soooooooooo our car gets 16 mi/gal and it can go 16*20  or 320 mi on 20 gal


Hope this helps---ptaylor