2024 AIME I Problem 1

來源: Bob007 於 2025-02-01 17:48:27 [] [舊帖] [給我悄悄話] 閱讀數 : (4101 bytes)

Every morning Aya goes for a $9$-kilometer-long walk and stops at a coffee shop afterwards. When she walks at a constant speed of $s$ kilometers per hour, the walk takes her 4 hours, including $t$ minutes spent in the coffee shop. When she walks $s+2$ kilometers per hour, the walk takes her 2 hours and 24 minutes, including $t$ minutes spent in the coffee shop. Suppose Aya walks at $s+\frac{1}{2}$ kilometers per hour. Find the number of minutes the walk takes her, including the $t$ minutes spent in the coffee shop.

所有跟帖： 

• 有意思的問題。我兒子小時候做AIME -dong140- ♂ 給 dong140 發送悄悄話 dong140 的博客首頁 (0 bytes) () 02/01/2025 postreply 17:53:52

• too easy for Chinese. -朝陽如沐- ♂ 給 朝陽如沐 發送悄悄話 朝陽如沐 的博客首頁 (0 bytes) () 02/01/2025 postreply 18:24:34

• 第一題本就是要大部分人能做出來 -Bob007- ♂ 給 Bob007 發送悄悄話 (0 bytes) () 02/01/2025 postreply 18:37:08

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