自行车轮胎的外直径是5分米,如果每分钟转200周,小明家到学校距离是0.628米,小明骑车需几分钟才能到校?
人气:456 ℃ 时间:2019-10-19 19:06:15
解答
您好:
5分米=0.5米
0.628千米=628米
需要628÷(0.5x3.14x200)=628÷314=2分钟
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