来自胡震的问题
【一辆汽车的轮子直径1米，若行驶时车轮转速为8周/秒，取π≈3，试计算这辆汽车的行驶速度为每小时多少千米？】
一辆汽车的轮子直径1米，若行驶时车轮转速为8周/秒，取π≈3，试计算这辆汽车的行驶速度为每小时多少千米？
1回答
2020-05-16 18:35
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李繁
1小时=3600秒，
3×1×8×3600
=24×3600
=86400（米）
=86.4（千米）；
答：这辆汽车的行驶速度为每小时86.4千米．
故答案为：68．
2020-05-16 18:39:26
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