侧壁面积:94.2*50=4710cm^2底面半径:r=94.2/(2*3.14)=15cm^2底面积:3.14*15*15=706.5cm^24710+706.5=5416.5cm^2=5417cm^2所以而用铁皮5417cm^2牛奶体积:706.5*50*4/5=28260cm^3=28.26dm^3=28.26升牛奶质量:28.26*1.03=29.1078千克=29千克所以能牛奶29千克
