1.有12个油桶的表面要刷漆,每平方米需要用油漆0.5千克,每个油桶的底面半径是20cm,高是60cm,刷12个油桶需多少kg油漆?2.做一个高6分米、底面半径1.8分米的无盖圆柱形铁皮水桶,大约要用铁皮多少
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![1.有12个油桶的表面要刷漆,每平方米需要用油漆0.5千克,每个油桶的底面半径是20cm,高是60cm,刷12个油桶需多少kg油漆?2.做一个高6分米、底面半径1.8分米的无盖圆柱形铁皮水桶,大约要用铁皮多少](/uploads/image/z/42245-53-5.jpg?t=1.%E6%9C%8912%E4%B8%AA%E6%B2%B9%E6%A1%B6%E7%9A%84%E8%A1%A8%E9%9D%A2%E8%A6%81%E5%88%B7%E6%BC%86%2C%E6%AF%8F%E5%B9%B3%E6%96%B9%E7%B1%B3%E9%9C%80%E8%A6%81%E7%94%A8%E6%B2%B9%E6%BC%860.5%E5%8D%83%E5%85%8B%2C%E6%AF%8F%E4%B8%AA%E6%B2%B9%E6%A1%B6%E7%9A%84%E5%BA%95%E9%9D%A2%E5%8D%8A%E5%BE%84%E6%98%AF20cm%2C%E9%AB%98%E6%98%AF60cm%2C%E5%88%B712%E4%B8%AA%E6%B2%B9%E6%A1%B6%E9%9C%80%E5%A4%9A%E5%B0%91kg%E6%B2%B9%E6%BC%86%3F2.%E5%81%9A%E4%B8%80%E4%B8%AA%E9%AB%986%E5%88%86%E7%B1%B3%E3%80%81%E5%BA%95%E9%9D%A2%E5%8D%8A%E5%BE%841.8%E5%88%86%E7%B1%B3%E7%9A%84%E6%97%A0%E7%9B%96%E5%9C%86%E6%9F%B1%E5%BD%A2%E9%93%81%E7%9A%AE%E6%B0%B4%E6%A1%B6%2C%E5%A4%A7%E7%BA%A6%E8%A6%81%E7%94%A8%E9%93%81%E7%9A%AE%E5%A4%9A%E5%B0%91)
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