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처일이가 집에서 16 km 떨어진 학교에 등교하는데 음에는 시속 50 km 로 달리는 버스를 타고 가다가 도 에 버스에서 내려서 시속 5 km 로 걸었더니 총 30 분 걸렸다. 서일이가 버스를 타고 간 거리는 몇 km 인 구하시오.

Ask by Lyons Griffin. in South Korea
Mar 09,2025

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서일이가 버스를 타고 간 거리는 15 km입니다.

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먼저, 주어진 정보를 정리해봅시다! 서일이는 총 30분, 즉 0.5시간 동안 학교에 가는데, 이 중 일부는 버스를 타고, 나머지는 걷는 시간이죠. 버스를 타는 속도는 시속 50 km, 걷는 속도는 시속 5 km입니다. 버스를 타고 간 거리와 걷는 거리를 각각 B km, W km 라고 하면, 두 거리는 다음과 같은 관계가 성립합니다: B + W = 16 km 시간 관계 또한 생각해보세요. 버스를 타고 간 시간은 B/50이고, 걷는 시간은 W/5입니다. 두 시간을 합쳐서 0.5시간이니: B/50 + W/5 = 0.5 이 두 식을 풀면, B값을 쉽게 구할 수 있습니다. 이 과정에서 B를 우선 구해보세요!

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