Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 16)
16.
A train travelling at a speed of 75 mph enters a tunnel 3
miles long. The train is 
mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?
miles long. The train is mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?Answer: Option
Explanation:
| Total distance covered |
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 Time taken |
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| = 3 min. |
Discussion:
129 comments Page 8 of 13.
Geemee said:
10 years ago
How can we known that m=mile it can be meter?
Anurag said:
10 years ago
@Geemee.
It already mentioned m=mile.
It already mentioned m=mile.
Vishu said:
10 years ago
Time = Distance/Speed.
Time = (15/4)/75.
So how will it come like this 15/4*75?
Time = (15/4)/75.
So how will it come like this 15/4*75?
Poonam goyal said:
9 years ago
Why you not change the miles into a meter?
Anup said:
9 years ago
Let me try to make this clear in 2 points.
#1. This question is same as train crossing the platform
#2. If we keep on reducing the size of tunnel till it reaches to size zero,i.e., the tunnel has now become a point so now we will calculate the time by using the length of the train only once. now when the size of the tunnel is added we can calculate time by Length of the train + Length of the tunnel / speed of the train.
#1. This question is same as train crossing the platform
#2. If we keep on reducing the size of tunnel till it reaches to size zero,i.e., the tunnel has now become a point so now we will calculate the time by using the length of the train only once. now when the size of the tunnel is added we can calculate time by Length of the train + Length of the tunnel / speed of the train.
Rahul Bhosale said:
9 years ago
Mph means mile per hour OR meter per hour?
I think mile per hour is correct.
I think mile per hour is correct.
Avii said:
9 years ago
Yeah! the answer will be 3.2 sec.
As it is clearly written from the moment front enter to the moment rear emerge so, twice the length of the train.
As it is clearly written from the moment front enter to the moment rear emerge so, twice the length of the train.
Kunal hire said:
9 years ago
How to convert min into an hour? Please anyone explain.
Sanjay singh said:
9 years ago
According to me, the answer is 3.2 min.
Prakhar Mittal said:
9 years ago
It is not clear that the speed is given in which units as Rahul Bhosale asked above.
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