수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] [창의]숨 참기

space 2020.09.13 20:43 조회 459

문제 푼 사람 1명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

난 30c 0% 소금물에서 40초 동안 숨을 참을 수 있다

소금 0%일때 1도가 내려갈 때 마다 0.5초가 줄고, 1도 늘어날 때 마다 40도가 되기 전까지는 1초씩 늘어난다(40도 이상부터는 5초가 줄어든다)

30c 일때 소금의 농도가 5% 늘어날 때마다 3초가 줄어든다

그럼 70f 20% 일때 몇 초간 참을 수 있는가?

이전글 [창의]복면산

다음글 625[정수]

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harryho Lv.2 2020.09.13 23:50 비밀댓글

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