Answer:
4 minutes 7 1/2 seconds
Step-by-step explanation:
For the train to completely cross the bridge, it must travel a distance equal to the sum of its own length and that of the bridge.
time = distance/speed
time = (1 +0.1) km/(16 km/h) = 1.1/16 h ≈ 0.06875 h
It will take the train 0.06875 hours, about 4 minutes 7 1/2 seconds, to cross the bridge.
