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Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
나도 수학쌤 문장제 문제를 변형해 문제를 내는 곳입니다.
[문장제 문제&개념응용] [대수][기하] 어이없는 세계 2: 전구깨기
17수락
2020.12.14 23:21
조회 432
수락과 친구들은 병원에서 나온 뒤 어이없게도 병원비 대신 집에 있는 전구들을 모두 깨라는 편지를 받았다
수락은 집에 있는 전구들을 매투,리만과 함께 깨려고 한다
그런데 그 전구들을 깨면 남은 쓰레기를 폐기처분하는데 돈이 든다
수락은 어찌어찌하다가 집에 있는 모든 전구들을 최대한 빈틈을 적게 해서 모아보고 그것에 맞춰 선을 그어보니 원이 되었다
그 윈의 반지름에는 4개의 전구가 붙어있고, 최대의 전구가 들어있다
전구는 원 모양으로 생각하며, 폐기처분을 1개 하면 3000원이 든다
그런데 싸구려 전구는 폐기처분을 할때 2000원밖에 안든다
전구의 20% 이하로 원 밖에 나간 전구는 원 안에 든것으로 계산한다
원의 지름이나 반지름에 걸쳐있는 전구는 싸구려 전구라고 칠때, 모든 전구들을 폐기처분하는데는 얼마가 들까?
지금 바로
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