Question

Femi drove 290 miles from his college to home and used 23.2 gallons of gasoline. His sister, Kehinde, drove 225 miles from her college to home and used 15 gallons of gasoline. Whose vehicle had better gas mileage? [5]

Answer 1

Find the unit cost (that is, the number of miles per gallon of gas) in each case.

Case 1:

290 mi

------------- = 12.5 mpg

23.2 gal

Case 2:

225 mi

------------ = 15 mpg

15 gal

Kehinde's car got the better mileage:  15 mpg versus 12.5 for Femi's car.

Answer 2

to find miles per gallon we simply do D/G

D = distance

G = gallons

290/23.2 = 12.5 mpg

225/15 = 15 mpg

Kehinde has better gas mileage.