Final answer:
The information allows us to calculate the speed of the cross-country runner.
Step-by-step explanation:
The information given allows us to calculate the speed of the cross-country runner. In this case, the speed can be calculated by dividing the distance traveled (4 km) by the time taken (15 minutes). So, the runner's speed is 4 km/15 min = 0.27 km/min.
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