SOLUTION: A​ person's car uses 4 gal of gasoline to travel 132 mi. He has 3 gal of gasoline in the​ car, and he wants to know how much more gasoline he will need to drive 400 mi.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: A​ person's car uses 4 gal of gasoline to travel 132 mi. He has 3 gal of gasoline in the​ car, and he wants to know how much more gasoline he will need to drive 400 mi.      Log On


   

Question 1113616: A​ person's car uses 4 gal of gasoline to travel 132 mi. He has 3 gal of gasoline in the​ car, and he wants to know how much more gasoline he will need to drive 400 mi. If we assume that the car continues to use gasoline at the same​ rate, how many more gallons will he​ need?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
Fuel efficiency is 132%2F4=33 miles per gallon.

If want to drive 400 miles, then need 400%2Amiles%2A%281%2F33%29%28gallons%2Fmiles%29=12%264%2F33 gallons.

If the person already has 3 gallons then he still needs 9%264%2F33 more gallons.