Question
Lucy left home at 11.25 a.m. and drove towards the suburb. 2 hours later, her uncle left their home and drove towards the same suburb at 81 km/h. When the uncle reached the suburb at 6.25 p.m., Lucy had another 6 km to travel. What was Lucy’s average speed? Express your answer in mixed number.
3 m

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Lucy left home at 11.25 a.m. and drove towards the suburb. 2 hours later, her uncle left their home and drove towards the same suburb at 81 km/h. When the uncle reached the suburb at 6.25 p.m., Lucy had another 6 km to travel. What was Lucy’s average speed? Express your answer in mixed number.