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

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

it would be d. henry moseley

hope this !

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