Question: A 222 m long train crosses a pole in 6 s. The same train crosses a man running in the same direction in 10 s. What will be the speed of man? [LIC (AAO) 2013]
Options:
A) 15 m/s
B) 17 m/s
C) 18 m/s
D) 14 m/s
E) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
- Speed of train $ =\frac{222}{6}=37,m/s $
If the speed of man be x m/s.
Then, $ \frac{222}{37-x}=10 $
$ \Rightarrow $ $ 222=370-10x $
$ \Rightarrow $ $ -148=-10x\Rightarrow x=14.8m/s $
$ \therefore $ $ x\approx 15,m/s $