Question
Jack drove at an average speed of 70 km/h for 42 minutes. He then reduced his average speed by 10 km/h and drove a further 40 minutes before he reached his house. Find the total distance covered by Jack.
3 m

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Jack drove at an average speed of 70 km/h for 42 minutes. He then reduced his average speed by 10 km/h and drove a further 40 minutes before he reached his house. Find the total distance covered by Jack.