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15问答网 > 一支粗细均匀的蜡烛长15cm，点燃6分钟蜡烛缩短3cm，照这样的速度，点燃16分钟后蜡烛还剩多长？

一支粗细均匀的蜡烛长15cm，点燃6分钟蜡烛缩短3cm，照这样的速度，点燃16分钟后蜡烛还剩多长？

2025-04-02 16:48:42

推荐回答（3个）

回答1：

由题意可知：蜡烛每分钟燃烧的长度一定，则燃烧的时间与燃烧长度成正比，据此即可列比例求解．
解答：解：设蜡烛点燃16分钟缩短x厘米，
6：3=16：x，
6x=3×16，
6x=48，
x=8；
答：蜡烛点燃16分钟缩短8厘米．
点评：解答此题的关键是明白：两个量的商一定，则这两个量成正比，据此列比例求解即可．

回答2：

点燃6分钟蜡烛缩短3cm
,所以,点燃16分钟蜡烛缩短8cm
这样,还剩下:15cm-8cm=7cm

回答3：

7

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