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13问答网 > 一辆自行车车轮的外直径是0.7米，如果每分钟转80周，这辆自行车通过一座长530米的大桥，大约要几

一辆自行车车轮的外直径是0.7米，如果每分钟转80周，这辆自行车通过一座长530米的大桥，大约要几

2025-03-16 04:26:09

推荐回答（2个）

回答1：

你好：

车轮周长=3.14×0.7=2.198（米）
每分钟前进=2.198×80=175.84（米）
需要时间=530÷175.84≈3（分钟）

回答2：

=530÷（3.14×0.35×0.35×80）
=530÷30.772
≈2.6分钟

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