A certain truck uses 18 gallons of diesel fuel in traveling.

Expert replies

BTGmoderatorLU: Moderator; Posts: 2544; Joined: Sun Oct 15, 2017 1:50 pmFollowed by: 6 members

by BTGmoderatorLU » Thu Mar 01, 2018 11:01 am

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.

Like this post

Source: Beat The GMAT — Problem Solving | Thu Mar 01, 2018 11:01 am

DavidG@VeritasPrep: Legendary Member; Posts: 2663; Joined: Wed Jan 14, 2015 8:25 amFollowed by: 128 members; Location: Boston, MA; Thanked: 1153 times; GMAT Score:770

by DavidG@VeritasPrep » Thu Mar 01, 2018 12:42 pm

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

Like this post

GMAT/MBA Expert

Scott@TargetTestPrep: GMAT Instructor; Posts: 8137; Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members; Location: Los Angeles, CA; Thanked: 43 times

by Scott@TargetTestPrep » Tue Mar 06, 2018 9:21 am

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.

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

559 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review