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수학동아 - 폴리매스
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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] [창의]페인트칠
space 2020.09.16 01:56 조회 456
문제 푼 사람 1명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

난 전체 5m×20m인 벽에 페인트칠을 할려고 한다

최대한 빠르고 정확하게 해야 한다(오차가 1m²/s라면 1초에 1m²가 잘못 칠해 진다는 것이다)

붓 종류 속도 오차
나무 붓 100cm²/s

5cm²/s
철 붓 200cm²/s

15cm²/s
대왕 붓 2.5m²/s

175cm²/s
미술 붓 50cm²/s

없다
물총(?) 10m²/s

1m²/s
도장 π×100cm²/s

60cm²/s

그럼 최단의 방법을 구하시오

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