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19-02-2019
Chemistry

contestada

A train travels 99 km in two hours and then 72 km in two hours what is it’s average speed

Respuesta :

19-02-2019

Answer:

42.75 km/h

Step-by-step explanation:

Average speed = total distance/total time

Total distance = 99 + 72

= 171 km

Total time = 2 + 2

= 4 h

Average speed = 171/4

= 42.75 km/h

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