Quantitative Aptitude Ques 568

Question: How long (time in seconds) will a 450 m long train take to cross a girl walking with a speed of 5 km/h in the direction of the moving train. The speed of the train is 65 km/h? [NICL (AO) 2013]

Options:

A) 27

B) 28

C) 30

D) 29

E) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

  • Relative speed $ =(65-5)=60,km/h $ Distance = 450 m

$ \therefore $ Time taken by train to cross the girl $ =\frac{450}{\frac{60\times 1000}{3600}}=\frac{450\times 3600}{60\times 1000}=27,s $

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