Car X gets 25 percent more miles per gallon of gasoline than : PS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 18 Jan 2017, 06:28

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Car X gets 25 percent more miles per gallon of gasoline than

Author Message
Senior Manager
Joined: 30 Oct 2004
Posts: 284
Followers: 1

Kudos [?]: 62 [0], given: 0

Car X gets 25 percent more miles per gallon of gasoline than [#permalink]

### Show Tags

05 Sep 2005, 14:55
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Car X gets 25 percent more miles per gallon of gasoline than Car Y does. However, Car X requires premium gasoline that costs 10 percent more than regular gasoline used by Car Y. If the two cars are driven equal distances, what percent less than the money spent on gasoline for Car Y is the money spent on gasoline for Car X?

A) 22.5%
B) 17.5%
C) 15%
D) 12%
E) 10%
Senior Manager
Joined: 27 Aug 2005
Posts: 331
Followers: 2

Kudos [?]: 144 [0], given: 0

### Show Tags

05 Sep 2005, 15:30
Plugging easy numbers (doesn't matter if they're realistic or not):

Car Y gets 100 miles per gallon. Car X gets 25% more or 125 miles per gallon. A gallon costs $1.00. So if they both drive 100 miles, car Y spends$1.00 and car X spends (100/125) or 0.8 x ($1.00x1.1) = 0.8 x$1.10 = $0.88.$0.88 is 12% less than $1.00. So the answer would be D) 12%. Senior Manager Joined: 03 Nov 2004 Posts: 488 Followers: 2 Kudos [?]: 11 [0], given: 0 ### Show Tags 05 Sep 2005, 15:30 Answer D => Assuming mileage: X car - 20 miles/gallon [25% more than Y] Y car - 16 miles/gallon and also Premium is 10% more than regular - assuming regular =$2.00 , premium is %2.20.

Cost of gasoline per car [assuming equal distance driven - 160 miles]:

X - 160/20 = 8 gallons @ $2.20 =$17.60
Y - 160/16 = 10 gallons @ $2.00 =$20.00

From this we get => 20.00-17.60 = 2.40 => 2.40/20.00 = %12 savings, hence answer D.
Senior Manager
Joined: 03 Nov 2004
Posts: 488
Followers: 2

Kudos [?]: 11 [0], given: 0

### Show Tags

05 Sep 2005, 15:32
plugging in is also a nice way of doing it. probably faster than my solution, nice work.
Senior Manager
Joined: 27 Aug 2005
Posts: 331
Followers: 2

Kudos [?]: 144 [0], given: 0

### Show Tags

05 Sep 2005, 15:33
Logic was the same in both our solutions. You just picked realistic numbers and I picked easy unrealistic ones. (I wish gasoline cost $1.00 a gallon!) Senior Manager Joined: 03 Nov 2004 Posts: 488 Followers: 2 Kudos [?]: 11 [0], given: 0 ### Show Tags 05 Sep 2005, 15:36 you got that right, i wish my car was giving me 100 miles per gallon. Senior Manager Joined: 27 Aug 2005 Posts: 331 Location: Montreal, Canada Followers: 2 Kudos [?]: 144 [0], given: 0 ### Show Tags 05 Sep 2005, 15:41 Hehe... smart car time Anyway I guess I wasn't thinking too hard about the numbers themselves because I think of gas prices in litres, not gallons, and consumption in kilometers, not miles. The theory's the same though. Senior Manager Joined: 30 Oct 2004 Posts: 284 Followers: 1 Kudos [?]: 62 [0], given: 0 ### Show Tags 05 Sep 2005, 16:11 D it is! Yes, plugging in numbers makes it simpler to solve. Thanks! _________________ -Vikram Intern Joined: 04 Sep 2005 Posts: 13 Followers: 0 Kudos [?]: 1 [0], given: 0 ### Show Tags 07 Sep 2005, 03:23 You can also have x use 8 gallons and y use 10 gallons 25% difference. Then have gas cost$10 so x spens $88 and y spends$100
The difference is \$12 so 12%
07 Sep 2005, 03:23
Display posts from previous: Sort by