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A car travels up a hill at a constant speed of 40 km/h and returns down the hill at the speed of 60 km/h. a) Calculate the average speed for the...
A car travels up a hill at a constant speed of 40 km/h and returns down the hill at the speed of 60 km/h. a) Calculate the average speed for the round trip. b) Calculate the average velocity for the round trip.