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posted by Ethan Sunday, January 16, 2011 at 2:27pm.
A car travels up a hill at a constant speed of 33 km/h and returns down the hill at a constant speed of 60 km/h. Calculate the average speed (in km/h) for the round trip.
AVG. Speed = (33 + 60) / 2 = 46.5km/h.
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