Question: How many seconds will a 500 m long train take to cross a man walking with a speed of 3 km/ h in the direction of moving train, if the speed of the train is 63 km/h?
Options:
A) 25
B) 30
C) 40
D) 45
Show Answer
Answer:
Correct Answer: B
Solution:
- Speed of train relative to man $ =(63-3)km/h $
$ =60km/h=\frac{60\times 5}{18}m/s $
$ =\frac{50}{3}m/s $
$ \therefore $ Time taken to pass the man $ =500\times \frac{3}{50}=30s $