Surface area of cylinder

Determine the lateral surface of the rotary cylinder which is circumscribed cube with edge length 5 cm.

Correct result:

S =  189.6119 cm2


a=5 r=2 a/2=2 5/23.5355 h=a=5 S1=π r2=3.1416 3.5355239.2699 S2=2π r h=2 3.1416 3.5355 5111.0721 S=2 S1+S2=2 39.2699+111.0721=189.6119 cm2

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