How many m2 of the copper plate should be replaced on the roof of the tower conical shape with diameter 24 m, and the angle at the axial section's vertex is 144°?

Correct answer:

S =  476 m2

Step-by-step explanation:

r=24/2=12 m s=r/sin(144/2)=12.62 m  S=πrs=π1212.62=476 m2

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