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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## A certain truck uses 18 gallons of diesel fuel in traveling. tagged by: BTGmoderatorLU ##### This topic has 2 expert replies and 0 member replies ### Top Member ## A certain truck uses 18 gallons of diesel fuel in traveling. A certain truck uses 18 gallons fuel in traveling 270 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck's fuel mileage be increased? A. 8 B. 9 C. 12 D. 15 E. 27 The OA is C. I'm really confused by this PS question. Experts, any suggestion about how can I solve it? Thanks in advance. ### GMAT/MBA Expert Legendary Member Joined 14 Jan 2015 Posted: 2667 messages Followed by: 121 members Upvotes: 1153 GMAT Score: 770 LUANDATO wrote: A certain truck uses 18 gallons fuel in traveling 270 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck's fuel mileage be increased? A. 8 B. 9 C. 12 D. 15 E. 27 The OA is C. I'm really confused by this PS question. Experts, any suggestion about how can I solve it? Thanks in advance. Initial miles per gallon = miles/gallon = 270/18 = 15 New miles per gallon that we aspire to = 270/10 = 27 So we need an increase of 27-15 = 12. The answer is C _________________ Veritas Prep | GMAT Instructor Veritas Prep Reviews Save$100 off any live Veritas Prep GMAT Course

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### GMAT/MBA Expert

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LUANDATO wrote:
A certain truck uses 18 gallons fuel in traveling 270 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck's fuel mileage be increased?

A. 8
B. 9
C. 12
D. 15
E. 27
Currently the fuel mileage of the truck is 270/18 = 15 miles per gallon. If the truck were to use 10 gallons of fuel to travel 270 miles, then the fuel mileage would be 270/10 = 27 miles per gallon. Thus, the fuel mileage has to be increased by 27 - 15 = 12 miles per gallon.

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