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Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model
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Line: 559
Function: get_footer
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
sicma
2020.12.07 18:27
조회 464
제 실제 휴대폰 사례를 들고 와봤습니다.
휴대폰이 0%에서 70%까지 30분 만에 충전 된다.
그리고 70%에서 100%는 20분 만에 충전 된다.
휴대폰을 사용할 때에는 100%에서 50%는 45분 만에 닳는다.
50%에서 0%는 5분 또는 40분 만에 닳는다.
그렇다면 휴대폰을 하루종일 사용할때 최대 사용시간은 몇 시간인가?
또한 평균 사용시간은 어떻게 되는가?
(맨 처음에 0%로 시작하고 베터리는 정수단위로만 체크 됩니다.)
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sicma
Lv.11
2020.12.07 20:31
어... 말이 조금 애매한데
만약 휴대폰을 30분 또는 50분을 사용할 수 있을 때 평균이라는 것은 40분을 의미합니다.
(30이 50% 50이 50%를 차지하는 것 처럼요)
또한 40분 40분 70분이라면 50분이 평균이 되는것이에요.
좋아요0
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sicma
Lv.11
2020.12.07 20:32
그러니까 정리하자면 저 문제에서 나올 수 있는 모든 값의 평균을 구하는 것이라고 말할 수 있겠네요
좋아요0
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sicma
Lv.11
2020.12.07 20:34
추가 설명
충전하면서 사용할 수 있고
100%충전 되면 무조건 휴대폰을 써야 한다.
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지금 바로
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