Cylinder 60463

Find the surface and volume of a cylinder whose height is 10 dm and the base circle radius is 20cm.

Correct answer:

S =  150.7964 dm2
V =  125.6637 dm3

Step-by-step explanation:

h=10 dm r=20 cm dm=20:10  dm=2 dm  S1=π r2=3.1416 2212.5664 dm2 S2=2π r h=2 3.1416 2 10125.6637 dm2  S=2 S1+S2=2 12.5664+125.6637=150.7964 dm2
V=S1 h=12.5664 10=125.6637 dm3

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Please make me understand

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