Question 9
The source describes “5 towns” along a river, shown below.
Numbers are downstream travel times between consecutive towns. Upstream travel takes 50% longer on each segment; for example town 2→town 1 takes 15 minutes instead of 10. Exactly two towns may receive hospitals. Each resident travels to the hospital taking the least travel time. Where should the hospitals be built to minimize the largest resident travel time?
Editorial clarification: use all six towns numbered 1–6 in the source figure and options; the source’s count “5” is inconsistent with them.
Numbers are downstream travel times between consecutive towns. Upstream travel takes 50% longer on each segment; for example town 2→town 1 takes 15 minutes instead of 10. Exactly two towns may receive hospitals. Each resident travels to the hospital taking the least travel time. Where should the hospitals be built to minimize the largest resident travel time?
Editorial clarification: use all six towns numbered 1–6 in the source figure and options; the source’s count “5” is inconsistent with them.