A train leaves from mumbai to patna n vice versa at 9 am everyday and reaches patna at 9:30 am after 3 days.a train left from mumbai to patna then how many trains did it come across while the journey?

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manoj

  • Apr 16th, 2006
 

at 0900 hrs 2 trains leave: one from mum and other from pat. so now n=1.next day at 0900 hrs another train leaves pat. so now n=22nd day at 0900 hrs another train leaves pat. so now n=33rd day at 0900 hrs another train leaves pat but the train from mum is yet to reach patna (arr. 0930hrs). hence it crosses this train as well. then n=4. Ans.

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Nachiket Patel

  • Apr 16th, 2006
 

Only 1..bcoz train is same 1....right.?

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Nachiket Patel

  • Apr 16th, 2006
 

ok..seriously..answer is 5 trains...

1st day 2 trains , 2nd day 1 and 3rd day again 2...

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simran

  • Apr 21st, 2006
 

answer is 4

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harishravi

  • Apr 30th, 2006
 

HEI GUYS I THINK THE ANSWER IS 3.bECAUSE EVERYDAY THERE IS A TRAIN is STARTING.MAY BE WRONG BECAUSE I MAY HAVE MISCONSTRUED THE PROBLEM.if,so correct me!

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Sonali Panda

  • May 1st, 2006
 

ans:3

9 to 9:30 journey

1.it'll meet train left from patna at 9 on same day

2.it'' meet  train left from patna at 9 on next day

3.it'' meet  train left from patna at 9 on 3rd day

4.and reach at 9:30

also it can't meet any of the train leaving from mumbai in the next two days

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sabin sathyan

  • May 5th, 2006
 

hi,

         pls send me the placement papers of infosys with explanatory answers

                                       Thank u

                                                    sabin

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ranjan

  • May 6th, 2006
 

Manoj, your answer is absolutely right. good work. keep it up and continue pal.....I really dont understand why ppl have written wrong answers even after reading your answer.

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ganesh gopinath

  • May 15th, 2006
 

friends, rather giving only questions please send the answers too if u know. it will be more usefull         thank u

                         

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Jyotiraditya

  • May 22nd, 2006
 

7Patna: -3 -2 -1 0 1 2 3Mumbai: -3 -2 -1 0 1 2 3It meets all the train shown... so total no of meetings with other train = 7

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Sangeetha

  • Jul 1st, 2006
 

Let the train start on day X at 9. Then

It'll meet a train which started on X-3 from Patna at 9.30..

So obiviosly it meets the train started on X-2... ....till X+3.

It meets de last train half an hour before it reach Patna..

(It may be confusing, think logically You'll understand)

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