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Inbound vs Outbound:

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Manager
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It takes a train 20 minutes to go from station A to station [#permalink] New post 12 Oct 2008, 05:08
It takes a train 20 minutes to go from station A to station B. How long does it take the train to return from station B to station A?

A:The average speed of the train on the outbound route is half its speed on the inbound route
B:The distance between the stations is 10 miles



* How to decide what is outbound route and inboud route?
* Can we assume A-B is outbound and B-A is inboud route?


Thanks
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Re: Inbound vs Outbound: [#permalink] New post 12 Oct 2008, 06:45
vishalgc wrote:
It takes a train 20 minutes to go from station A to station B. How long does it take the train to return from station B to station A?

A:The average speed of the train on the outbound route is half its speed on the inbound route
B:The distance between the stations is 10 miles

* How to decide what is outbound route and inboud route?
* Can we assume A-B is outbound and B-A is inboud route?


Thanks


Nothing is clear about which is inbound and outbound. so E.

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Re: Inbound vs Outbound: [#permalink] New post 12 Oct 2008, 07:00
OA was A :)


I think today is not my day.... where ever I applied special logic I was wrong :)

again this is from very higly reputed source ..

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VP
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Re: Inbound vs Outbound: [#permalink] New post 12 Oct 2008, 10:36
vishalgc wrote:
It takes a train 20 minutes to go from station A to station B. How long does it take the train to return from station B to station A?

A:The average speed of the train on the outbound route is half its speed on the inbound route
B:The distance between the stations is 10 miles



* How to decide what is outbound route and inboud route?
* Can we assume A-B is outbound and B-A is inboud route?


Thanks

Even i got A
But yes after reading through ur query i got confused .
Anyways i dont expect such questions in GMAT

again its not logical to get confused about outbound vs inbound!!the word return in question must be the clue !!
we want to solve quant why we got understand english here too :evil: i never get this

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Re: Inbound vs Outbound: [#permalink] New post 12 Oct 2008, 10:43
vishalgc wrote:
It takes a train 20 minutes to go from station A to station B. How long does it take the train to return from station B to station A?

A:The average speed of the train on the outbound route is half its speed on the inbound route
B:The distance between the stations is 10 miles



* How to decide what is outbound route and inboud route?
* Can we assume A-B is outbound and B-A is inboud route?


Thanks


luckily this is DS. It wont matter that much (which is inbound which is outbound)

We know time taken for one part of the journey.

From A We know the relation between the speeds of both the parts of the journey. So we can obviously determine the time taken for second part of the journey :)

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Re: Inbound vs Outbound: [#permalink] New post 12 Oct 2008, 11:03
vishalgc wrote:
OA was A :)


I think today is not my day.... where ever I applied special logic I was wrong :)

again this is from very higly reputed source ..

Thanks

If A to B is outbound, then B to A is inbound and it takes 10 minuets.
If B to A is outbound, then A to B is inbound and it takes 10 minuets.

so its not sure from statement 1.

What is the source of this question?

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Verbal: new-to-the-verbal-forum-please-read-this-first-77546.html
Math: new-to-the-math-forum-please-read-this-first-77764.html
Gmat: everything-you-need-to-prepare-for-the-gmat-revised-77983.html


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VP
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Re: Inbound vs Outbound: [#permalink] New post 12 Oct 2008, 11:04
GMAT TIGER wrote:
vishalgc wrote:
OA was A :)


I think today is not my day.... where ever I applied special logic I was wrong :)

again this is from very higly reputed source ..

Thanks


What is the source of this question?


I think this one is from the Gmatclub tests :)

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Re: Inbound vs Outbound:   [#permalink] 12 Oct 2008, 11:04
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