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During a road trip, Richard drove his car at 80mph for 1 hour, and then at 60mph for 2 hours. What was the average speed for the entire journey?

 Nov 15, 2020
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Total distance traveled =  80 (1)  + 60 (2)  = 80 + 120 =  200

 

Avg rate = Distance / Time   =  200 / [ 1 + 2 ] =   200 / 3 =   66 + 2/3 mph

 

cool cool cool

 Nov 15, 2020

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