問題詳情
12 如圖所示，某人欲使用橡皮水管澆花，因長度不足所以連接了甲、乙、丙三段不同粗細的水管；箭頭表示水流方向。已知甲、乙、丙管內直徑分別為 5 cm、4 cm、3 cm；若水流充滿水管，且水管不漏水，則甲、乙、丙內的水流速率比 V 甲：V 乙：V 丙為多少？ 
(A) 
(B) 
(C)25:16:9
(D)5:4:3
參考答案
無參考答案
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