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14 August, 13:15

An airplane flies 80 km in 10 minutes and then flies 100 km in 20 minutes what is the average speed

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  1. 14 August, 13:29
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    The average speed is

    (80+100) / (10+20)

    =180/30

    =6 km/min
  2. 14 August, 13:43
    0
    The average speed = (speed 1 + speed 2) / 2

    the average speed = (80/10 + 100/20) / 2

    the average speed = (8 + 5) / 2

    the average speed = 13/2

    the average speed = 6.5 km/minute
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