SATHEE: Quantitative Aptitude Ques 419

Quantitative Aptitude Ques 419

Question: A 320 m long train moving with an average speed of 120 km/h crosses a platforms 24 s. A man crosses the same platform in 4 min. What is the speed (in m/s) of man? [BOB (PO) 2011]

Options:

A) 2.4

B) 1.6

C) 2.2

D) 1.5

E) None of these

Show Answer

Answer:

Correct Answer: E

Solution:

Speed of train = 120 km/h $ =\frac{120\times 5}{18}=\frac{100}{3}m/s $ Let the length of the platform be x m. Then, $ \frac{x+320}{\frac{100}{3}}=24 $
$ \Rightarrow $ $ 3,(x+320)=2400 $

$ \Rightarrow $ $ 3x+960=2400 $
$ \Rightarrow , $ $ 3x=1440 $

$ \Rightarrow $ $ x=\frac{1440}{3}=480,m $ Hence, speed of man $ =\frac{480}{4\times 60}m/s=2,m/s $

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Quantitative Aptitude Ques 419

Question: A 320 m long train moving with an average speed of 120 km/h crosses a platforms 24 s. A man crosses the same platform in 4 min. What is the speed (in m/s) of man? [BOB (PO) 2011]

Options:

Answer:

Solution:

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