Read the passage below and solve the questions based on it.
Trains X and Y start towards each other at the same time from points A and B for destinations B and A respectively that are 300 km apart. They meet each other 120 km from point A.
Another express train Z starts from point A to point B, 1 h after X starts. This express train meets train Y, 1.5 h after Z starts. If this express train is at least 20 km/h faster than the faster of X and Y, which of the following is true? (Ignore train lengths in calculations)