It is currently 20 Nov 2017, 10:51

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A train travels from Albany to Syracuse, a distance of 120 miles, at

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Intern
Intern
avatar
Status: pursuing a dream
Joined: 02 Jun 2011
Posts: 43

Kudos [?]: 108 [0], given: 10

Schools: MIT Sloan (LGO)
GMAT ToolKit User
A train travels from Albany to Syracuse, a distance of 120 miles, at [#permalink]

Show Tags

New post 13 Aug 2011, 07:46
3
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

77% (01:39) correct 23% (02:10) wrong based on 228 sessions

HideShow timer Statistics

A train travels from Albany to Syracuse, a distance of 120 miles, at the average rate of 50 miles per hour. The train then travels back to Albany from Syracuse. The total travelling time of the train is 5 hours and 24 minutes. What was the average rate of speed of the train on the return trip to Albany?

A: 60 mph
B: 50 mph
C: 48 mph
D: 40 mph
E: 35 mph
[Reveal] Spoiler: OA

Kudos [?]: 108 [0], given: 10

2 KUDOS received
Math Forum Moderator
avatar
Joined: 20 Dec 2010
Posts: 1965

Kudos [?]: 2094 [2], given: 376

Re: A train travels from Albany to Syracuse, a distance of 120 miles, at [#permalink]

Show Tags

New post 13 Aug 2011, 08:40
2
This post received
KUDOS
2
This post was
BOOKMARKED
LGOdream wrote:
A train travels from Albany to Syracuse, a distance of 120 miles, at the average rate of 50 miles per hour. The train then travels back to Albany from Syracuse. The total traveling time of the train is 5 hours and 24 minutes. What was the average rate of speed of the train on the return trip to Albany?

A: 60 mph
B: 50 mph
C: 48 mph
D: 40 mph
E: 35 mph


What would be the fastest / most efficient approach? The total travelling time being in hours and minutes is really annoying.


5 hours 24 minutes = \(5+\frac{24}{60}hours=5+\frac{2}{5}hours=\frac{27}{5}hours\)

From Albany to Syracuse,
D=120 miles
t=?
s=50 m/h

t*s=D
t=D/s=120/50=12/5 hours

Thus, time spent coming back = Total time-time spent going from A to S= \(\frac{27}{5}-\frac{12}{5}=\frac{15}{5}=3hours\)

Coming back:
Speed=D/t = 120/3=40 m/h

Ans: "D"
_________________

~fluke

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 2094 [2], given: 376

Director
Director
User avatar
Joined: 03 May 2007
Posts: 867

Kudos [?]: 271 [0], given: 7

Schools: University of Chicago, Wharton School
Re: A train travels from Albany to Syracuse, a distance of 120 miles, at [#permalink]

Show Tags

New post 13 Aug 2011, 18:49
LGOdream wrote:
A train travels from Albany to Syracuse, a distance of 120 miles, at the average rate of 50 miles per hour. The train then travels back to Albany from Syracuse. The total travelling time of the train is 5 hours and 24 minutes. What was the average rate of speed of the train on the return trip to Albany?

A: 60 mph
B: 50 mph
C: 48 mph
D: 40 mph
E: 35 mph


What would be the fastest / most efficient approach? The total travelling time being in hours and minutes is really annoying.


Total time taken 5 hours 24 minuets
Time taken to drive Albany to Syracuse = 120 miles /50 miles = 2 hours 24 minuets (here is a chance of doing 40 minuets instead of 24 minuets. This is a trap.)
Time taken to drive back from Albany to Syracuse = 5 hours 24 minuets - 2 hours 24 minuets = 3 hours

Speed to drive back from Albany to Syracuse = 120 / 3 hours = 40 mph.

Kudos [?]: 271 [0], given: 7

Director
Director
avatar
Joined: 01 Feb 2011
Posts: 725

Kudos [?]: 146 [0], given: 42

Re: A train travels from Albany to Syracuse, a distance of 120 miles, at [#permalink]

Show Tags

New post 14 Aug 2011, 11:29
Total time for the round trip = 5 hr 24 min

time taken for A to S trip = 12/5

time taken for S to A trip = 5+(24/60) - 12/5 = 3hr

Speed on the return trip = 120/3 = 40 mph

Answer is D.

Kudos [?]: 146 [0], given: 42

1 KUDOS received
Senior Manager
Senior Manager
User avatar
Status: Math is psycho-logical
Joined: 07 Apr 2014
Posts: 437

Kudos [?]: 141 [1], given: 169

Location: Netherlands
GMAT Date: 02-11-2015
WE: Psychology and Counseling (Other)
Re: A train travels from Albany to Syracuse, a distance of 120 miles, at [#permalink]

Show Tags

New post 05 Mar 2015, 16:31
1
This post received
KUDOS
99% of the cases I will make the RTD chart:

................R............T..........D
GO...........50.........2.4........120
BACK........40..........3..........120
ALL.......................5.4........240

First we need to note the measurement. So, the question asks for the Rate of BACK, and we are given the initial Rate for GO in miles per hour, so we need the Times to be in hours. So, 5 hours and 24 minutes will be 5.4 hours.

We only need to find how much 24 minutes are in hours, so 24/60 = 2/5 = 0,4. We add this to 5 hours, so total 5.4 hours.

We find the Time for GO like this:
50T=120
T=2.4

Now, we are only missing the time for BACK. We subtract 2.4 from 5.4 and end up with 3.

Finally, R*3=120 --> R = 40. ANS D

Kudos [?]: 141 [1], given: 169

Director
Director
avatar
P
Joined: 22 May 2016
Posts: 984

Kudos [?]: 342 [0], given: 592

A train travels from Albany to Syracuse, a distance of 120 miles, at [#permalink]

Show Tags

New post 12 Jul 2017, 17:24
LGOdream wrote:
A train travels from Albany to Syracuse, a distance of 120 miles, at the average rate of 50 miles per hour. The train then travels back to Albany from Syracuse. The total travelling time of the train is 5 hours and 24 minutes. What was the average rate of speed of the train on the return trip to Albany?

A: 60 mph
B: 50 mph
C: 48 mph
D: 40 mph
E: 35 mph

Total time - time for Leg1 = time for Leg2 (return)...

...which will yield rate of speed for Leg2.

1. Given: 5 hrs, 24 mins = 5\(\frac{24}{60}\) = 5\(\frac{4}{10}\) = 5.4 total time

2. Leg1 time = D/r --> \(\frac{120}{50}\) = 2.4 hrs

3. Leg2 time = 5.4 - 2.4 = 3 hrs

4.Leg2 rate of speed = D/t = \(\frac{120}{3}\) = 40 miles per hour

Answer D

Kudos [?]: 342 [0], given: 592

A train travels from Albany to Syracuse, a distance of 120 miles, at   [#permalink] 12 Jul 2017, 17:24
Display posts from previous: Sort by

A train travels from Albany to Syracuse, a distance of 120 miles, at

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.