希望能帮到你哟😄望采纳谢谢😜
6.28÷3.14÷2=1(cm)3.14×1^2 ×12.56=39.4384(cm^3)12.56 ÷3.14÷2=2(cm)3.14×2^2 ×6.28=78.8768(cm^3)
