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:
586 comments Page 7 of 59.

Ankit kumar said:   10 months ago
60*9/18.
50/3.
50/3*9.

= 150 Ans.
(8)

Ritik negi said:   11 months ago
1 km = 1000 m,
1 hr has 3600 sec.
So, 1 km/hr = 1000m/3600s = 5/18 m/s.
(106)

Benetict said:   11 months ago
60km/60min = 1km/min.
1km = 1000metres , 1hr = 60mins.
1000m/60min = 16.666667.
16.666667 * 9 = 150metres.
(79)

SREENIVASULU said:   11 months ago
Given, S = 60 km/hr,
Time(T) = 9 sec and L(T)=?

Speed(S) = (60 * 5/18) = (50/3 m/sec).
L(T) = S * T.
L(T) = (50/3*9)m.
= 150m.
(10)

Neha kumari said:   11 months ago
For converting km to m 60*1000 = 60000m.
For converting hrs. to sec. 60 * 60 = 3600sec.
60000/3600 = 16.6666.
16.666 * 9 = 150.
(42)

Saumya tripathi said:   11 months ago
Yes, the answer should be 150.
(9)

VVVR said:   12 months ago
1km = 1000m.
1hour = 3600sec.
1000/3600 = 5/18 mps.
(87)

Gauri Bhalerao said:   12 months ago
How 5/18 came, can anyone explain me? Please.
(40)

LUBNA said:   12 months ago
but how do we convert km into m?? and where does that 5/18 come from?

Anyone, please explain to me.
(26)

Mhs said:   1 year ago
The train is running at 60 km per hour and it crosses the poll in 9 seconds to calculate the length of the train the formula is length = speed * time
let's calculate;

60 km = 60000 m.
60 min = 60 * 60 = 3600 sec,
let's calculate speed per second:
60000/ 3600 = 16.666666 = 16.666666 m/s.

In one second train covered the 16.666666 m.
so the train crossed the poll in 9 second.
so;
16.666666 * 9 = 150.
(195)


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