Two trains each 1/6 mile in length run in opposite dirctions to each other with equal speed of 60 miles/hour. What is the time taken to completelycross over the two trains.

Speed at which two trains travel towards each other = 60+60 = 120 miles/hour.
Total length to be covered = (1/6)+(1/6) = 2/6 mile.
Time to taken to cover 2/6 mile at speed of 120 miles/hour is.....
(2/6)/120 = 1/360 hour = 10 seconds.

Beena
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Sep 15th, 2005
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omsekhar

Aug 11th, 2006

answer:10 seconds.
reason:3600*(1/6)*60=10

tmhasan7
Profile Answers by tmhasan7

Sep 20th, 2006

Lets Make Thinks clear..
1. Its obvious that since the trains travel towards each other the speed is 60+60 miles/hr
2. The two trains will take 2/6 miles to cross themselves, since the length of the train is 1/6 miles.
3. If it is 3600 sec for 120 miles, then x sec for 2/6 miles
Therefore 120/3600 = (2/6)/x
x=10 sec.

sivanesh.a
Profile Answers by sivanesh.a Questions by sivanesh.a

Dec 24th, 2006

10 SECONDS

ganesh

Jan 2nd, 2007

Hi,
I am doing B.E IIyr.I ve doubt how come you could say that the velocity is 120mile/hr......actually it appears to be twice the velocity of each but actually.....so are you trying to say at the time of crossing the train moves at 120mile/hr, once they get crossed they again go to 60mile/hr.how come this is possible ..........would you explain me this concept........