Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 26 May 2017, 14:44

### 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

# Distance and Spped - If a passenger sitting near the window

Author Message
Intern
Joined: 29 Dec 2012
Posts: 18
Followers: 1

Kudos [?]: 13 [0], given: 32

Distance and Spped - If a passenger sitting near the window [#permalink]

### Show Tags

13 Aug 2013, 23:11
If a passenger sitting near the window in a train moving at 40 kmh noticed that it took 3 seconds for the oncoming train to pass by, what was the speed of the oncoming train if the length of the oncoming train was 75 meters.

1)50 kmh
2)52 kmh
3)56 kmh
4)60 kmh
5)70 kmh
Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 7376
Location: Pune, India
Followers: 2288

Kudos [?]: 15127 [1] , given: 224

Re: Distance and Spped - If a passenger sitting near the window [#permalink]

### Show Tags

14 Aug 2013, 00:12
1
KUDOS
Expert's post
schittuluri wrote:
If a passenger sitting near the window in a train moving at 40 kmh noticed that it took 3 seconds for the oncoming train to pass by, what was the speed of the oncoming train if the length of the oncoming train was 75 meters.

1)50 kmh
2)52 kmh
3)56 kmh
4)60 kmh
5)70 kmh

Think of the passenger as a moving point with a speed of 40 kmph. The oncoming train took 3 secs to pass by this passenger which means that 75 m were covered by the passenger and the oncoming train in a total of 3 secs. So total speed = 75/3 = 25 m/s
Converting it to kmph, we get 25 * (18/5) = 90 kmph

So together the passenger and the oncoming train are moving at a speed of 90 kmph with respect to each other. Since the speed of the passenger is 40 kmph, the speed of the oncoming train must be 50 kmph.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for \$199

Veritas Prep Reviews

Re: Distance and Spped - If a passenger sitting near the window   [#permalink] 14 Aug 2013, 00:12
Similar topics Replies Last post
Similar
Topics:
1 Best place for distance/rate review and combinatorics 2 19 Mar 2017, 15:21
Overseas Distance Education 1 23 Dec 2014, 13:05
GMATPrep on Windows 8.1 0 21 Sep 2014, 06:03
There are 5 chairs. Tim and Jack want to sit such that Tim i 7 06 Mar 2012, 09:59
3 MCI Diver erro on windows 7 17 11 Dec 2014, 21:44
Display posts from previous: Sort by