Question
Yen left home at 11.15 a.m. and drove towards the city. 2 hours later, her mother left their home and drove towards the same city at 99 km/h. When the mother reached the city at 5.15 p.m., Yen had another 6 km to travel. What was Yen’s average speed? Express your answer in mixed number.
3 m

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Yen left home at 11.15 a.m. and drove towards the city. 2 hours later, her mother left their home and drove towards the same city at 99 km/h. When the mother reached the city at 5.15 p.m., Yen had another 6 km to travel. What was Yen’s average speed? Express your answer in mixed number.