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7 September, 11:47

A car and a motorcycle move in the same direction by the same highway. At the beginning, the distance between them is 105 km. The car driver maintains an average speed of 90 km/h. What is the average speed of the motorcyclist, if the car driver caught up with him in 3 hours?

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  1. 7 September, 13:26
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    Car: distancec = 105 km + (90 km/hr) (3 hrs)

    Cycle: distancem = ratem (3 hrs)

    Equate these 2 distances: 105 km + 270 km = ratem (3 hrs)

    Then 375 km / 3 hrs = ratem = 125 km/hr (average speed of the motorcyclist)
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