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07-06-2018
Physics

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A car drives 40 miles on local roads at 20 mph, and 180 miles on the highway at 60 mph, what is the average speed of the entire trip?

Respuesta :

17-06-2018

40 miles at 20 mph takes 2 hours
180 miles at 60 mph takes 3 hours

Average speed = Total distance / Total time
= (40 + 180) / (2 + 3)
= 220 / 5
= 44

The correct answer is 44 m/s

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