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30 July, 21:17

A train traveled 300 km in 5 hours and then increased in speed, traveling the final 100 km in 1.5 hours. What was the train's average speed in km/h?

66.7 km/h

60 km/h

61.5 km/h

54 km/h

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Answers (1)
  1. 30 July, 21:59
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    200 km ... 3,5 h

    100 km ... 1,5 h

    v1 = 200/3,5=57,1

    v2 = 100/1,5 = 66,6

    vm = (57.1+66,6) / 2≈ 61,5 km/h
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