Problem On Trains

The problem involves calculating the length of the train given the speed, time, and length of a tunnel. Let's solve this step by step.

First, convert the speed from km/h to m/s:

m/s

Next, calculate the total distance covered by the train in 36 seconds:

m

This total distance includes both the length of the train and the length of the tunnel. We know the tunnel's length is 350 m.

Therefore, the length of the train is:

m

This confirms the correct answer is 450 meters.