Consumption 69174

The tower's roof has the shape of the shell of a rotating cone with a base diameter of 4.3 m. The deviation of the side from the plane of the base is 36°. Calculate the consumption of sheet metal to cover the roof, assuming 8% for waste.

Correct answer:

S =  19.39 m2

Step-by-step explanation:

d=4.3 m α=36° rad=36° 180π =36° 1803.1415926 =0.62832=π/5 q=100%+8%=1+1008=1.08 r=d/2=4.3/2=2043=2.15 m  cos α = r:s  s=r/cosα=2.15/cos0.62832.6575 m  S1=π r s=3.1416 2.15 2.657517.9502  S=q S1=1.08 17.9502=19.39 m2

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