3.14*1.5*200=942(米)
300千米=300000米
300000÷942≈318(分钟)
火车的主动轮直径是1.5米,如果每分钟转200圈,行驶300千米大约需要多少分?
火车的主动轮直径是1.5米,如果每分钟转200圈,行驶300千米大约需要多少分?
数学人气:287 ℃时间:2019-10-19 21:15:12
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