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 7 of 13.
Sarang said:
7 years ago
Distance=speed * time.
3.1/2+1/4=75 m/h *time,
3.5+.25=75m/h*time,
3.75=75m/h *time,
3.75/75m/h=time,
Time=.05*60=3min.
3.1/2+1/4=75 m/h *time,
3.5+.25=75m/h*time,
3.75=75m/h *time,
3.75/75m/h=time,
Time=.05*60=3min.
Sathish said:
8 years ago
Distance/speed = time.
So.
15/4 * 75 means it comes (15/4) /75 so 15*75/4 is the way is correct why 15/4*75? Explain.
So.
15/4 * 75 means it comes (15/4) /75 so 15*75/4 is the way is correct why 15/4*75? Explain.
Shimul Khalid said:
5 years ago
Distant: 7/2+1/4+1/4 miles = 4 miles.
Speed: 5/4 miles/minute.
Time duration should be 3.2 minutes, I think.
Speed: 5/4 miles/minute.
Time duration should be 3.2 minutes, I think.
Vivek said:
1 decade ago
How can do it (15/4*75) hrs,
Because 15/4 unit-mils.
and
75 unit-mph.
Then how can possible (15/4*75)hrs?
Because 15/4 unit-mils.
and
75 unit-mph.
Then how can possible (15/4*75)hrs?
PALLA NAGESH said:
5 years ago
(7/2+1/4) = (28+2)/4 = 30/4 = 15/2 , but how you will tell its as 15/4?
Can you explain it clearly?
Can you explain it clearly?
Swetha said:
1 decade ago
Hi @Arun kumar. This method is so confusing can you please tell me other method to convert into 15/4.
Chaithanyadeepthi said:
1 decade ago
7/2= 3*2+1/2;
But i have one doubt
Why don't we convert miles into meters can anyone explain this?
But i have one doubt
Why don't we convert miles into meters can anyone explain this?
Nidhi kumari said:
7 years ago
The total distance should be,
(7/2 +2(1/4)) = 4miles,
So the required time will be 3.2 second.
(7/2 +2(1/4)) = 4miles,
So the required time will be 3.2 second.
Ramme said:
1 decade ago
Time taken=15/(4*75) how its comes.
Because t=d*s means (15 * 75)/4 only possible am confused.
Because t=d*s means (15 * 75)/4 only possible am confused.
Naresh said:
7 years ago
Total distance covered.
= 7/2 + 1/4.
=15/4 miles.
Can anyone explain me, how to convert it?
= 7/2 + 1/4.
=15/4 miles.
Can anyone explain me, how to convert it?
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