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# A train traveling at 72 kmph crosses a platform in 30

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Director
Joined: 27 Jun 2005
Posts: 515
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A train traveling at 72 kmph crosses a platform in 30 [#permalink]  02 Dec 2005, 23:23
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A train traveling at 72 kmph crosses a platform in 30 seconds and a man standing on the platform in 18 seconds. What is the length of the platform in meters?

240 meters
360 meters
420 meters
600 meters
720 meters
SVP
Joined: 28 May 2005
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Location: Dhaka
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Kudos [?]: 72 [0], given: 0

76000*30/60 *60 = 600
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hey ya......

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This problem is a typical one in that from the fact that the train passes a person in 18 sec, we can know the length of the train coz a person's width is minuscule ( just like a vertical thinnest rod) ...the train pass a person just as passing itself/ its own length.See my illustration for better vision. Correct answer is A
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72kmph.doc [25.5 KiB]

Director
Joined: 14 Sep 2005
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laxieqv wrote:
This problem is a typical one in that from the fact that the train passes a person in 18 sec, we can know the length of the train coz a person's width is minuscule ( just like a vertical thinnest rod) ...the train pass a person just as passing itself/ its own length.See my illustration for better vision. Correct answer is A

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Auge um Auge, Zahn um Zahn !

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