At 18 34, Roshel started driving at 63 km/h from her home to a reservoir 42 km away. She was at the reservoir for 2 h 20 min.
- What time did she leave the reservoir?
- After leaving the reservoir, Roshel drove back along the same route and took 24 min to reach home. What was her average speed, in km/h, for the journey home?