At 15 34, Shiyun started driving at 55 km/h from her home to a market 44 km away. She was at the market for 2 h 26 min.
- What time did she leave the market?
- After leaving the market, Shiyun drove back along the same route and took 32 min to reach home. What was her average speed, in km/h, for the journey home?