A) 8 s
B) 6 s
C) 7 s
D) 5 s
Correct Answer: B
Solution :
Length of both trains \[=105+90=195\text{ m}\] Relative speed \[=(45+72)=117\text{ km/h}\] \[=117\times \frac{5}{18}=\frac{65}{2}\text{m/s}\] \[\therefore \] Time taken\[=\frac{195}{\frac{65}{2}}=\frac{195\times 2}{65}=6\,\,\text{s}\]You need to login to perform this action.
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