If Jan used 3 gallons of gas to go 141 miles, how far could he go on 7 gallons?

Answer 1

Using ratios we can solve this problem. Or you could understand using the following steps:

3 gallons for 141 miles

so 1 gallon will give you 141/3 miles

Therefore 7 gallons will give you (141/3)* 7 = 329 miles

hope this helps!

Answer 2

Hello, Gregory,

Let's calculate a conversion factor, assuming he gets the same gas mileage on the two trips. We can write:

141 miles/3 gallons, or 47 miles/gal.

Use that factor to find how far 7 gallons will take him:

7 gal *(47 miles/gal) = 329 miles. Gallons cancel, leaving just miles.

Bob