SOLUTION: a motorist drives 80km per hour in 5 hours and another 60 km per hour in 4 hours. find the average speed for the whole journey

SOLUTION: a motorist drives 80km per hour in 5 hours and another 60 km per hour in 4 hours. find the average speed for the whole journey

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Question 1125096: a motorist drives 80km per hour in 5 hours and another 60 km per hour in 4 hours. find the average speed for the whole journey
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Total distance, (80*5+60*4) kilometers, 640 kilometers

Total time, 9 hours

Speed of whole journey, average, kilometers per hour
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