Final answer:
Average speed is calculated by dividing the total distance traveled by the time taken. For a cross-country skier completing a 7.5 km race in 45 min, the average speed is 10 km/h.
Explanation:
Average speed is calculated by dividing the total distance traveled by the time taken. In this case, for the cross-country skier completing a 7.5 km race in 45 min, the average speed can be found by:
Average speed = Total distance / Time taken
Substitute the values:
Average speed = 7.5 km / 0.75 hours = 10 km/h
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