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Function: driver

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Function: model

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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: require_once

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Function: _error_handler

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: getFloatingMyInfo

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 559
Function: get_footer

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

수학동아 - 폴리매스
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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] 달리기 시합!
△π 2020.04.06 03:01 조회 497
문제 푼 사람 0명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

삼각이와 파이는 달리기 시합을 하기로 했다. 삼각이의 속력은 달린 시간에 비례하고, 파이의 속력은 달린 시간의 제곱에 비례한다. 삼각이가 파이보다 6km(!!)뒤의 지점을 통과할 때 파이가 출발한다. 파이가 출발한지 20분 후에 삼각이가 파이를 추월하고, 삼각이가 파이를 추월한지 10분 후에 다시 파이가 삼각이를 추월한다. 파이가 삼각이보다 30km(!!!!!)멀어질 때는 파이가 출발한지 몇 분 후인가?

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