Ratio and Proportion Word Problems: Train

It took a train 2020 seconds to completely pass a 500500 -m iron bridge. When the train was passing through a 19001900 -m tunnel, it was invisible from outside of the tunnel for 3030 seconds. If the speed of the train was constant, what was the length of the train (in meters)?

Details and Assumptions:

  • The train passes the iron bridge when no part of the train is on the bridge.
  • The train is invisible from outside of the tunnel when no part of the train is outside of the tunnel.
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