Answer:
Length of the train=1/12 km
Step-by-step explanation:
The train took 3 seconds to disappear into the tunnel travelling at 100 km/h
It means, the train travelled its length in 3 seconds.
Length of the train can be calculated thus
Length of the train=speed ×time
=100km/hr * 3/3600
=300 / 3600
=30 / 360
= 1 / 12 km
