At 18 45, Roshel started driving at 70 km/h from her home to a beach 42 km away. She was at the beach for 1 h 37 min.
- What time did she leave the beach?
- After leaving the beach, Roshel drove back along the same route and took 21 min to reach home. What was her average speed, in km/h, for the journey home?