Cylindrical 27733

The cylindrical silo has a diameter of 4 m and a height of 7 m. For how many m2 is it necessary to buy paint to paint against corrosion (we paint the silo only from the outside)?

Correct answer:

S =  113.0973 m2

Step-by-step explanation:

D=4 m h=7 m r=D/2=4/2=2 m  S1=π r2=3.1416 2212.5664 m2 S2=π D h=3.1416 4 787.9646 m2  S=2 S1+S2=2 12.5664+87.9646=113.0973 m2

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