Question : If a train is 75 metres long and moving at 60 km/hr, how long does it take to pass by a certain telegraph post?
Option 1: 3.5 seconds
Option 2: 4.5 seconds
Option 3: 5 seconds
Option 4: 5.4 seconds

Question

Question : If a train is 75 metres long and moving at 60 km/hr, how long does it take to pass by a certain telegraph post?

Option 1: 3.5 seconds

Option 2: 4.5 seconds

Option 3: 5 seconds

Option 4: 5.4 seconds

Team Careers360 · Accepted Answer

Correct Answer: 4.5 seconds

Solution : Given: The distance of the train is 75 m and its speed is 60 km/h.
We know that, $ ext{Time}=\frac{ ext{Distance}}{ ext{Speed}}$
To convert km/h into m/s, multiply with $\frac{5}{18}$, we get,
$60\ km/h=60 imes \frac{5}{18}=\frac{50}{3} m/s$
So, the train will take the required time, $\frac{75}{\frac{50}{3}}= 4.5$ seconds
Hence, the correct answer is 4.5 seconds.

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Question : If a train is 75 metres long and moving at 60 km/hr, how long does it take to pass by a certain telegraph post?Option 1: 3.5 secondsOption 2: 4.5 secondsOption 3: 5 secondsOption 4: 5.4 seconds

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Question : If a train is 75 metres long and moving at 60 km/hr, how long does it take to pass by a certain telegraph post?
Option 1: 3.5 seconds
Option 2: 4.5 seconds
Option 3: 5 seconds
Option 4: 5.4 seconds