The observatory

The dome of the hemisphere-shaped observatory is 5.4 meters high. How many square meters of sheet metal needs to be covered to cover it, and 15 percent must be added to the minimum amount due to joints and waste?

Correct result:

S =  210.7003 m2


r=5.4 m  S1=4π r2=4 3.1416 5.42366.4354 m2  k=1+15/100=2320=1.15  S=S1/2 k=366.4354/2 1.15=210.7003 m2

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