Dora drove 80 km in 40 minutes then 120 km in 1 hour and then the final 200km took him 1 hour 20 minutes. what is his average speed for the

Question

Dora drove 80 km in 40 minutes then 120 km in 1 hour and then the final 200km took him 1 hour 20 minutes. what is his average speed for the whole journey​

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Delwyn 4 years 2021-08-10T17:02:45+00:00 1 Answers 74 views 0

Answers ( )

  1. Nick
    0
    2021-08-10T17:04:16+00:00
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    9514 1404 393

    Answer:

      133 1/3 km/hour

    Step-by-step explanation:

    Average speed is computed as …

      average speed = (total distance)/(total time)

      = (80 km +120 km +200 km)/(2/3 + 1 + 1 1/3 hour) = 400 km/(3 hour)

      = 133 1/3 km/hour

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