跑道的一旁插查着41面小旗,小旗间隔3米,现改为只插31面,间隔应改为多少米?
1个回答
(41-1)*3=120米
120/(31-1)=4米
答:跑道的一旁插查着41面小旗,小旗间隔3米,现改为只插31面,间隔应改为4米.
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