Mathematics
Junior High
Resolved
九上數學求解謝謝（二段）😺
900
1. 小明在一個半徑為
公尺的圓形滾輪跑步,若他
π
在4分鐘跑完時,讓滾輪共轉了280°,則小明每分
鐘的速率為多少公尺?
【解】
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