Surface and volume

Calculate the surface and volume of a cylinder whose height is 8 dm and the radius of the base circle is 2 dm

Correct answer:

S =  125.6637 dm2
V =  100.531 dm3

Step-by-step explanation:

h=8 dm r=2 dm  S1=π r2=3.1416 2212.5664 dm2 S2=2π r h=2 3.1416 2 8100.531 dm2  S=2 S1+S2=2 12.5664+100.531=125.6637 dm2
V=S1 h=12.5664 8=100.531 dm3

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