可以幫忙解一下數學題目嗎?謝謝!!?
回答 (1)
2016-12-19 10:38 pm
記開始驗票前已有 a 名粉絲等待進場, 記每分鐘有 p 位粉絲到隊,
則 (a + 45p) / (15 × 45) = (a + 30p) / (20 × 30)
8(a + 45p) = 9(a + 30p)
a = 90p
記 25 個工作人員需 m 分鐘驗完, 則 (a + mp) / (25m) = (a + 45p) / (15 × 45) = (a + 30p) / (20 × 30)
(90 + m)p / (25m) = (90 + 45)p / (15 × 45) = (90 + 30)p / (20 × 30)
(90 + m) / (25m) = 1/5
450 + 5m = 25m
m = 22.5
答: (E)
則 (a + 45p) / (15 × 45) = (a + 30p) / (20 × 30)
8(a + 45p) = 9(a + 30p)
a = 90p
記 25 個工作人員需 m 分鐘驗完, 則 (a + mp) / (25m) = (a + 45p) / (15 × 45) = (a + 30p) / (20 × 30)
(90 + m)p / (25m) = (90 + 45)p / (15 × 45) = (90 + 30)p / (20 × 30)
(90 + m) / (25m) = 1/5
450 + 5m = 25m
m = 22.5
答: (E)
收錄日期: 2021-04-11 21:31:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161214062010AAuLcyQ