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Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
나도 수학쌤 문장제 문제를 변형해 문제를 내는 곳입니다.
[문장제 문제&개념응용] 다 같이 돌자 행성 한바퀴~~
멜론쿠키
2021.01.20 01:47
조회 490
행성이 하나 있다. 이 행성에서 사람, 배 비행기가 있는데, 사람은 초속 4m, 배는 초속 16m, 비행기는 시속 35km로 간다.
그런데 사람은 같은 속도로 계속 가고 배는 반바퀴를 돌때마다 속도가 계속 0.8배로 줄어든다. 비행기는 1시간마다 이착륙을 해야 하는데
이착륙하는데 각각 10분이 걸린다. 이때, 이착륙은 행성과 수직 방향으로 한다. 행성의 반지름이 220km일때, 누가 3바퀴를 제일 빨리 돌며, 얼마나 걸릴까?
(단, 정확하게 원을 그리며 행성을 돈다.)
(원주율: 3)
-
멜론쿠키
Lv.5
2021.01.21 20:33
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