karias1980 karias1980

10-04-2018
Physics

contestada

A train travels 79 kilometers in 2 hours, and then 77 kilometers in 3 hours. What is its average speed?

Answers? and Units?

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zhaotianyu369 zhaotianyu369

11-04-2018

Average speed=total distance traveled/time. Total distance=the sum of the two short distances=79*2+77*3=389 km. Total time used to travel is 2+3=5 hr. Average speed is 389/5=77.8 km/hr.

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