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 32 of 59.

Chithra said:   8 years ago
Thanks for all who have give explanation for this question, without your help I can't understand this problem.

Shoaib soudagar said:   8 years ago
You can simply solve like this.

1 0mtrs/1hr * second.
1000/60 * 9 = 150.

Sazzad said:   8 years ago
Thanks a lot for the given explanation.

Siddhesh Anavkar said:   8 years ago
Formula.

1. Distance = speed * time
2. km/hr --> m/sec conversion

For ex. convert 90 km/hr to m/sec
Solution:-

90 km/1 hr = 90,000 m/3600 sec
= 25 m/sec.

Pinky said:   8 years ago
Can anyone explain me this step 60*5/18 =50/3?

Dorji said:   8 years ago
For (√(3N))^3/2=90.
I found N=134.44.

Iqbal rasool said:   8 years ago
Nice and thank you sir.

Rahul Singh said:   7 years ago
Thanks for the explanation.

Asif Bilakhiya said:   7 years ago
Train Speed=60km/hr.
Take 9 seconds to cross the pole.

60km =60000 metres,
1hr=3600 seconds,
Ans=150 metres,
Explanation:
=(9x60000)/(3600),
=150 metres.

Vivek said:   7 years ago
We calculated the train length with reference to the pole. But what about the length of the pole. Doesn't it come to picture here?

Please, anyone, clarify it.


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