The conversation between human and AI assistant.
[|Human|] Generate a set of instructions for solving the given logical puzzle.
[|AI|] Follow these steps to solve the logical puzzle:

1. Determine the total distance between the two trains, which is given to be 120km.

2. Find out the speed of Train A, which is given to be 54 km/h and the speed of Train B, which is given to be 42 km/h.

3. Add the speeds of Train A and Train B to determine the relative speed of the trains as they move towards each other. The relative speed is 54 km/h + 42 km/h = 96 km/h.

4. Use the formula distance = speed x time to find the time it takes for the two trains to meet. Let the time taken for the two trains to meet be t. Therefore, t = distance / relative speed = 120 km / 96 km/h = 1.25 hours.

In conclusion, the two trains will meet after 1.25 hours of travel.
[|Human|] 
Generate a set of instructions for solving the given logical puzzle.