Question
Violet started travelling at 6 a.m. at a speed of 69 km/h towards a town. Isaac started travelling towards the town from the same place 3 hours later. When Violet reached the town at 6 p.m., Isaac had another 180 km to travel. What was Isaac's average speed?
3 m

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Violet started travelling at 6 a.m. at a speed of 69 km/h towards a town. Isaac started travelling towards the town from the same place 3 hours later. When Violet reached the town at 6 p.m., Isaac had another 180 km to travel. What was Isaac's average speed?