A train 110 metres long is running with a speed of 60 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going?
5 sec
6 sec
7 sec
10 sec
Explanation:
Speed of train relative to man = (60 + 6) km/hr = 66 km/hr.
| =$ \left(66 \times\dfrac{5}{18} \right) $m/sec |
| =$ \left(\dfrac{55}{3} \right) $m/sec. |
| $\therefore$ Time taken to pass the man =$ \left(110 \times\dfrac{3}{55} \right) $sec = 6 sec. |