NEW HERE? LEARN MORE
closeclose
Last visit was: 23 Apr 2024, 14:12 It is currently 23 Apr 2024, 14:12
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

A train running at 81 km/hr takes 24 seconds to cross a

User avatar
sunniboy007
Senior Manager
Senior Manager
Joined: 30 Aug 2003
Posts: 252
Own Kudos [?]: 147 [0]
Given Kudos: 0
Location: BACARDIVILLE
Send PM
A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 13:08
A train running at 81 km/hr takes 24 seconds to cross a platform completely. It takes 10 seconds to pass a man running in the opposite direction at 9 km/hr. What is the length of the platform?
{1km/hr=5/18m/s}

a.250 metres
b.240
c.290
d.210
e.260



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
shubhangi
Manager
Manager
Joined: 30 Aug 2003
Posts: 183
Own Kudos [?]: 157 [0]
Given Kudos: 0
Location: dallas , tx
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 13:39
guess something is missing in your question ..
User avatar
sunniboy007
Senior Manager
Senior Manager
Joined: 30 Aug 2003
Posts: 252
Own Kudos [?]: 147 [0]
Given Kudos: 0
Location: BACARDIVILLE
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 13:43
:? Nothing is missing from the question. Everything you need to solve is there.
User avatar
shubhangi
Manager
Manager
Joined: 30 Aug 2003
Posts: 183
Own Kudos [?]: 157 [0]
Given Kudos: 0
Location: dallas , tx
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 13:54
is it A ..250?
will show working later
User avatar
sunniboy007
Senior Manager
Senior Manager
Joined: 30 Aug 2003
Posts: 252
Own Kudos [?]: 147 [0]
Given Kudos: 0
Location: BACARDIVILLE
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 13:57
No.
Show your reasoning maybe can help.
Cheers
User avatar
shubhangi
Manager
Manager
Joined: 30 Aug 2003
Posts: 183
Own Kudos [?]: 157 [0]
Given Kudos: 0
Location: dallas , tx
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 14:05
what i did is relative speed =(81+9)=90*5/18=25
let the lenght of plt =x
distnce for: x/25=10..so x=250???
i feel more information should be there.
User avatar
sunniboy007
Senior Manager
Senior Manager
Joined: 30 Aug 2003
Posts: 252
Own Kudos [?]: 147 [0]
Given Kudos: 0
Location: BACARDIVILLE
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 14:11
How I solved:

81 km/hr = 22.5 m/s
9 km/hr = 2.5 m/s
RS = 25 m/s
Lt + Lp/22.5 = 24sec
Lt = 25 m/s * 10 = 250 metres
Hence, 250 + Lp/22.5 = 24
Therefore, Lp = 290 metres.

Hope that helps.
User avatar
shubhangi
Manager
Manager
Joined: 30 Aug 2003
Posts: 183
Own Kudos [?]: 157 [0]
Given Kudos: 0
Location: dallas , tx
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 14:15
yeah, i was combining both insame equation i guess.
User avatar
Paul
CEO
CEO
Joined: 15 Dec 2003
Posts: 2709
Own Kudos [?]: 1537 [0]
Given Kudos: 0
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 14:57
Just curious to know who that girl in the picture is sunnyboy. She is hot :)
User avatar
sunniboy007
Senior Manager
Senior Manager
Joined: 30 Aug 2003
Posts: 252
Own Kudos [?]: 147 [0]
Given Kudos: 0
Location: BACARDIVILLE
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 14:58
the previous one?
or current?
User avatar
Paul
CEO
CEO
Joined: 15 Dec 2003
Posts: 2709
Own Kudos [?]: 1537 [0]
Given Kudos: 0
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 15:05
Both, but i find this one hotter, maybe because you see the whole silhouette
User avatar
stoolfi
Manager
Manager
Joined: 28 Oct 2003
Posts: 246
Own Kudos [?]: 260 [0]
Given Kudos: 0
Location: 55405
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 15:07
Is Angelina Jolie banned from Canadian television sets?

She's pretty famous here in Uhmerrikuh.

And Gmatclub is such a boyzone!
User avatar
sunniboy007
Senior Manager
Senior Manager
Joined: 30 Aug 2003
Posts: 252
Own Kudos [?]: 147 [0]
Given Kudos: 0
Location: BACARDIVILLE
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 15:09
Last one: Maria Menunos (spelling?) :kiss
This one: Angelina Jolie :sex
User avatar
Paul
CEO
CEO
Joined: 15 Dec 2003
Posts: 2709
Own Kudos [?]: 1537 [0]
Given Kudos: 0
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 15:10
hehe, just didn't recognize her in that outfit. Change that picture, it is too distracting. How am I to focus on such a beautiful problem with such a despicable woman in the background?
User avatar
sunniboy007
Senior Manager
Senior Manager
Joined: 30 Aug 2003
Posts: 252
Own Kudos [?]: 147 [0]
Given Kudos: 0
Location: BACARDIVILLE
Send PM
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink] New post   16 Jan 2004, 15:14
Take a cold shower son. Lay off the Viagra, and keep studying... :lol:



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
GMAT Club Bot
gmatclubot
Re: A train running at 81 km/hr takes 24 seconds to cross a [#permalink]
16 Jan 2004, 15:14
Moderator:
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions