It is currently 20 Sep 2017, 06:14

### 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

# A certain car averages 25 miles per gallon of gasoline when

Author Message
TAGS:

### Hide Tags

SVP
Joined: 21 Jul 2006
Posts: 1513

Kudos [?]: 978 [0], given: 1

A certain car averages 25 miles per gallon of gasoline when [#permalink]

### Show Tags

15 Jul 2008, 10:12
1
This post was
BOOKMARKED
00:00

Difficulty:

(N/A)

Question Stats:

100% (02:32) correct 0% (00:00) wrong based on 18 sessions

### HideShow timer Statistics

A certain car averages 25 miles per gallon of gasoline when driven in the city and 40 miles per gallon when driven on the highway. According to these rates, which of the following is closest to the number of miles per gallon that the car averages when it is driven 10 miles in the city and then 50 miles on the highway?

a) 28
b) 30
c) 33
d) 36
e) 38

Kudos [?]: 978 [0], given: 1

Current Student
Joined: 04 Jan 2005
Posts: 283

Kudos [?]: 140 [0], given: 3

Location: Milan
Schools: Wharton, LBS, UChicago, Kellogg MMM (Donald Jacobs Scholarship), Stanford, HBS

### Show Tags

15 Jul 2008, 10:33
Total distance = 60 miles
City = 10 miles or 1/6
Highway = 50 miles or 5/6

Weighted average: (25 * 1/6) + (40 * 5/6) = 225/6 = 37,5

E

Kudos [?]: 140 [0], given: 3

Manager
Joined: 27 May 2008
Posts: 199

Kudos [?]: 45 [0], given: 0

### Show Tags

15 Jul 2008, 10:36

10/25 + 50/40 = 33/20 gallons for entire trip

so trips lasts 60 miles

60 * 20/33 = 36.36

Kudos [?]: 45 [0], given: 0

Current Student
Joined: 12 Jun 2008
Posts: 287

Kudos [?]: 58 [0], given: 0

Schools: INSEAD Class of July '10

### Show Tags

15 Jul 2008, 10:38
The car uses 1/25 gallon per mile in the city and 1/40 gallon per mile on a highway

Therefore, during the 60 miles (10 in the city, 50 on a highway) that it has to travel it would use:

10*1/25 + 50*1/40 = 33/20 gallons for the 60 miles i.e. 33/(20*60) gallons per mile on average

==> consumption = 1200/33 miles per gallon, which is close to 36

Kudos [?]: 58 [0], given: 0

Director
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 624

Kudos [?]: 1112 [0], given: 39

Re: A certain car averages 25 miles per gallon of gasoline when [#permalink]

### Show Tags

30 Nov 2011, 22:38
1/25*10 = 0.4
1/40*50 = 1.25

Total gasoline = 0.4+ 1.25 = 1.65

Average for 60 (10+50) = 60/1.65= 36.3........
Ans. D
_________________

Collections:-
PSof OG solved by GC members: http://gmatclub.com/forum/collection-ps-with-solution-from-gmatclub-110005.html
DS of OG solved by GC members: http://gmatclub.com/forum/collection-ds-with-solution-from-gmatclub-110004.html
100 GMAT PREP Quantitative collection http://gmatclub.com/forum/gmat-prep-problem-collections-114358.html
Collections of work/rate problems with solutions http://gmatclub.com/forum/collections-of-work-rate-problem-with-solutions-118919.html
Mixture problems in a file with best solutions: http://gmatclub.com/forum/mixture-problems-with-best-and-easy-solutions-all-together-124644.html

Kudos [?]: 1112 [0], given: 39

Intern
Joined: 23 May 2010
Posts: 7

Kudos [?]: [0], given: 1

Re: A certain car averages 25 miles per gallon of gasoline when [#permalink]

### Show Tags

01 Dec 2011, 05:22
Total Dist=10+50=60
Total Time = 10/25+50/40=33/20
Speed = D/t = 60x20/33=36.3...

Ans==>D

Kudos [?]: [0], given: 1

Manager
Joined: 24 Oct 2011
Posts: 93

Kudos [?]: 17 [2], given: 27

Location: India
GMAT Date: 11-29-2011
GPA: 3.5
WE: Web Development (Computer Software)
Re: A certain car averages 25 miles per gallon of gasoline when [#permalink]

### Show Tags

08 Dec 2011, 02:52
2
KUDOS
City = 10 miles or 1/6(25mpg)
Highway = 50 miles or 5/6(40mpg)

Average Mileage: (25 * 1/6) + (40 * 5/6) = 225/6 = 37.5

Kudos [?]: 17 [2], given: 27

Manager
Joined: 26 Apr 2011
Posts: 227

Kudos [?]: 21 [0], given: 14

Re: A certain car averages 25 miles per gallon of gasoline when [#permalink]

### Show Tags

13 Dec 2011, 00:09
OA is E
Total distance traveled = 60 miles
City = 10 miles or 1/6
Highway = 50 miles or 5/6

Weighted average: (25 * 1/6) + (40 * 5/6) = 225/6 = 37.5 miles per gallon

Kudos [?]: 21 [0], given: 14

Re: A certain car averages 25 miles per gallon of gasoline when   [#permalink] 13 Dec 2011, 00:09
Similar topics Replies Last post
Similar
Topics:
8 A certain car uses one gallon of gasoline every 30 miles when 2 11 Jun 2016, 07:05
33 Car X averages 25.0 miles per gallon of gasoline and Car Y 22 09 Feb 2017, 08:54
30 A certain car averages 25 miles per gallon when driving in 22 25 Jun 2017, 12:42
46 A certain car averages 25 miles per gallon of gasoline when 17 29 Jul 2017, 04:30
11 A certain car averages 25 miles per gallon of gasoline when 15 09 Sep 2016, 15:38
Display posts from previous: Sort by