Question
Opal left home at 11.35 a.m. and drove towards the town. 2 hours later, her mother left their home and drove towards the same town at 100 km/h. When the mother reached the town at 4.35 p.m., Opal had another 4 km to travel. What was Opal’s average speed? Express your answer in mixed number.
3 m

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Opal left home at 11.35 a.m. and drove towards the town. 2 hours later, her mother left their home and drove towards the same town at 100 km/h. When the mother reached the town at 4.35 p.m., Opal had another 4 km to travel. What was Opal’s average speed? Express your answer in mixed number.