S侧=S长=3.14×3=9.42m^2S表=S侧+2S圆=9.42+2×(3.14÷3.14÷2)^2=9.42+0.5=9.92m^2(π取3.14)
S侧=3.14×3=9.42m^2S表=9.42+2×(3.14÷3.14÷2)^2=9.42+0.5=9.92m^2(π的取值为3.14)采纳好么?