Mathematics, 03.05.2020 13:06, Cklug2520

A car moves with a speed of 30 km/h ^-1 for half an hour,25 km/h^-1 for one hour and 40 km/h^-1.Calculate the average speed of car.

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A car moves with a speed of 30 km/h ^-1 for half an hour,25 km/h^-1 for one hour and 40 km/h^-1.Calc...