Tower

How many m2 of the copper plate should be replaced on the roof of the conical tower shape with a diameter 23 m, and the angle at the axial section's vertex is 119°?

Correct answer:

S =  482 m2

Step-by-step explanation:

D=23 m α=119   r=D/2=23/2=223=11.5 m β=α/2=119/2=2119=59.5   sin β = r : s  s=r/sinβ=r/sin59.5° =11.5/sin59.5° =11.5/0.861629=13.34681 m  S=π r s=3.1416 11.5 13.3468=482 m2



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