一个圆形溜冰场的半径是10米为了便于晚上滑冰 工人师傅沿溜冰场的外圈每隔10米安装一盏灯 一共要装几盏灯?
快点!
人气:297 ℃ 时间:2020-04-16 19:52:13
解答
2X10X3.14/10=6.28
故:一共要装6盏灯
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