수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] [기하? 대수??] 손목시계

원파 2020.05.29 09:39 조회 782

문제 푼 사람 1명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

손목시계를 항상 차는 버블몬은 손목에 땀이 많이 나서 손목시계 보관함을 만들려고 한다.

손목시계는 조였을때 원형이고 버블몬은 손목시계를 보관할 때 항상 조인 채로 보관할 것이다.

손목시계를 조였을 때 생기는 내부 면적은 25 $\pi$ 이다. 손목시계보관함의 밑면은 최소한 얼마나 넓어야 할까?

(보관함은 사각기둥이며, 시계를 공간적 대각선으로 넣을 수 없다.)

(풀이는 필수!)

이전글 [조합] 색칠공부

다음글 [조합] 코딩 공부

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MathlabJ Lv.8 2020.05.29 09:48 비밀댓글

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