The cylinder 5

The base of the cylinder is 20 dm in diameter and a height of 18dm. Find its surface area.

Correct answer:

S =  1759.2919 dm2

Step-by-step explanation:

D=20 dm h=18 dm  r=D/2=20/2=10 dm  S1=π r2=3.1416 102314.1593 dm2 S2=π D h=3.1416 20 181130.9734 dm2  S=2 S1+S2=2 314.1593+1130.9734=1759.2919 dm2

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