Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 29 Aug 2016, 20:21

### 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

# Triathlete Dan runs along a 2-mile stretch of river and then swims bac

Author Message
TAGS:

### Hide Tags

Manager
Joined: 16 Jan 2007
Posts: 73
Followers: 1

Kudos [?]: 18 [2] , given: 0

Triathlete Dan runs along a 2-mile stretch of river and then swims bac [#permalink]

### Show Tags

24 Dec 2007, 04:10
2
KUDOS
7
This post was
BOOKMARKED
00:00

Difficulty:

45% (medium)

Question Stats:

67% (02:24) correct 33% (01:22) wrong based on 344 sessions

### HideShow timer Statistics

Triathlete Dan runs along a 2-mile stretch of river and then swims back along the same route. If Dan runs at a rate of 10 miles per hour and swims at a rate of 6 miles per hour, what is his average rate for the entire trip in miles per minute?

A. 1/8
B. 2/15
C. 3/15
D. 1/4
E. 3/8
[Reveal] Spoiler: OA

Last edited by Bunuel on 06 Oct 2014, 08:15, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
Director
Joined: 12 Jul 2007
Posts: 862
Followers: 15

Kudos [?]: 267 [1] , given: 0

Re: Triathlete Dan runs along a 2-mile stretch of river and then swims bac [#permalink]

### Show Tags

24 Dec 2007, 05:20
1
KUDOS
Dan travels 4 miles round trip.

Running part: (2/10 = 1/5*60 = 12 minutes)
Swimming Part: (2/6 = 1/3*60 = 20 minutes)

4 miles in (12+20) minutes
4/32 = 1/8 mile per minute

Director
Joined: 03 Sep 2006
Posts: 879
Followers: 6

Kudos [?]: 622 [0], given: 33

Re: Triathlete Dan runs along a 2-mile stretch of river and then swims bac [#permalink]

### Show Tags

24 Dec 2007, 06:16
dynamo wrote:
Triathlete Dan runs along a 2-mile stretch of river and then swims back along the same route. If Dan runs at a rate of 10 miles per hour and swims at a rate of 6 miles per hour, what is his average rate for the entire trip in miles per minute?

Total Distance/Total time

=4/ [( 1/5) + (1/3)]= 15/2

in miles per minute 15/2*60 = 1/8
SVP
Joined: 28 Dec 2005
Posts: 1575
Followers: 3

Kudos [?]: 130 [0], given: 2

Re: Triathlete Dan runs along a 2-mile stretch of river and then swims bac [#permalink]

### Show Tags

24 Dec 2007, 16:48
time to run = 1/5 hr = 12 minutes

time to swim = 1/3 hr = 20 minutes

average rate = total distance / total time
= 4 miles / 20+12 = 4/32 = 1/8 mile per minute
GMAT Club Legend
Joined: 09 Sep 2013
Posts: 11133
Followers: 511

Kudos [?]: 134 [0], given: 0

Re: Triathlete Dan runs along a 2-mile stretch of river and then swims bac [#permalink]

### Show Tags

14 Sep 2014, 21:37
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Manager
Joined: 13 Feb 2011
Posts: 104
Followers: 0

Kudos [?]: 23 [0], given: 3358

Re: Triathlete Dan runs along a 2-mile stretch of river and then swims bac [#permalink]

### Show Tags

14 Sep 2014, 21:46
1
This post was
BOOKMARKED
If distance traveled is same but at varying rates, the average rate can be found through the shortcut $$\frac{2ab}{a+b}$$ where a and b are individual rates.
In this problem $$a=10$$ and $$b=6$$ therefore average speed = $$\frac{15}{2}$$ miles per hour, i.e. $$\frac{1}{8}$$ miles per minute.

P.S. Added tags as saw this question in an MGMAT CAT.
SVP
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1858
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Followers: 38

Kudos [?]: 1664 [0], given: 193

Re: Triathlete Dan runs along a 2-mile stretch of river and then swims bac [#permalink]

### Show Tags

15 Sep 2014, 01:03
Dienekes wrote:
If distance traveled is same but at varying rates, the average rate can be found through the shortcut $$\frac{2ab}{a+b}$$ where a and b are individual rates.
In this problem $$a=10$$ and $$b=6$$ therefore average speed = $$\frac{15}{2}$$ miles per hour, i.e. $$\frac{1}{8}$$ miles per minute.

P.S. Added tags as saw this question in an MGMAT CAT.

Can you kindly update OA for this?

Thanks
_________________

Kindly press "+1 Kudos" to appreciate

GMAT Club Legend
Joined: 09 Sep 2013
Posts: 11133
Followers: 511

Kudos [?]: 134 [0], given: 0

Re: Triathlete Dan runs along a 2-mile stretch of river and then swims bac [#permalink]

### Show Tags

17 Nov 2015, 15:32
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: Triathlete Dan runs along a 2-mile stretch of river and then swims bac   [#permalink] 17 Nov 2015, 15:32
Similar topics Replies Last post
Similar
Topics:
4 Car A and Car B are each traveling along the same stretch of highway 5 17 Jul 2016, 08:46
If you go along the hypotenuse at a constant speed rate of 2 miles per 3 22 Feb 2016, 18:25
9 A rectangular lawn of length 200m by 120m has two roads running along 7 30 Jul 2015, 11:15
57 A palindrome is a number that reads the same forward and bac 12 07 Oct 2013, 01:31
1 Dan completes a 3 part exam as follows 3 21 Feb 2013, 08:05
Display posts from previous: Sort by