A) 20 s
B) 24.8 s
C) 28.8 s
D) 30 s
Correct Answer: C
Solution :
Relative speed of trains \[=(20+30)\,\text{km/h}\] \[=\frac{50\times 5}{18}\text{m/s}\] Total relative distance \[=20+200=400\,m\] \[\therefore \] Required time \[=\frac{400\times 18}{50\times 5}=28.8\,s\]You need to login to perform this action.
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