A) 56 km/h
B) 66 km/h
C) 60 km/h
D) 52 km/h
Correct Answer: C
Solution :
Speed of train relative to man \[=\left( \frac{110}{6} \right)\text{m/s}\] \[=\left( \frac{110}{6}\times \frac{18}{5} \right)\text{km/h}=66\,\,\text{km/h}\] Let the speed of the train be \[x\,\,\text{km/h}.\] Then, the relative speed \[=(x+6)\,\text{km/h}\] \[\therefore \] \[x+6=66\]or \[x=66-6=60\,\,\text{km/h}\]
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