Question
Billy drove at an average speed of 80 km/h for 51 minutes. He then reduced his average speed by 8 km/h and drove a further 25 minutes before he reached his house. Find the total distance covered by Billy.
3 m

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Billy drove at an average speed of 80 km/h for 51 minutes. He then reduced his average speed by 8 km/h and drove a further 25 minutes before he reached his house. Find the total distance covered by Billy.