Aptitude - Problems on Trains - Discussion

Discussion Forum : Problems on Trains - General Questions (Q.No. 1)
1.
A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
120 metres
180 metres
324 metres
150 metres
Answer: Option
Explanation:

Speed = 60 x 5 m/sec = 50 m/sec.
18 3

Length of the train = (Speed x Time).

Length of the train = 50 x 9 m = 150 m.
3

Discussion:
587 comments Page 29 of 59.

Muni said:   1 decade ago
60 km/hr *speed = 60 x 5/18 m/sec.

Giri said:   1 decade ago
1 km = 1000 meters.

1 hr = 3600 seconds.

1 km/hr = 1000/3600 m/s.

Qaazi said:   1 decade ago
Where has the 50/3 come from? please explain.

Moupiya said:   1 decade ago
Train Cross Stationary object without length.

t = Lt/St.

Lt = length of train.

St = speed of train.

Can I follow this formula for this question as I follow made easy book and for this type of question this formula is used but I'm not getting the answer thru this formula.

Can any 1 help.

Thankyou.

Prashanth said:   1 decade ago
Speed = (60*(5/18)) divide 60&18 by 6, then,
Speed = (10*(5/3)) multiply 10 & 5,
Speed = (50/3).

That's all @Qaazi.

Amol said:   1 decade ago
Why will take 18/5 please tell me?

Rahul said:   1 decade ago
We get 16.67m/s.

That is, the train traveled 16.67 meters in 1 second.

Then multiply 9 seconds with 16.67 meters.

Then length of the train traveled 150 meters in 9 seconds.

Akhil said:   1 decade ago
How many square feet is 1 metre ?

Shankaranathan .K said:   1 decade ago
Really its very nice guys. Thank you all for the explanation and your time spent in answering the question raised by other.

Sumit said:   1 decade ago
Why it is divide by 5/18?


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