Roof of the church

The cone roof of the church has a diameter of 3m and a height of 4m. What is the size of the side edge of the church roof (s) and how much sheet will be needed to cover the church roof?

Correct result:

s =  5.6569 m
S =  71.0861 m2


D=8 m h=4 m r=D/2=8/2=4 m s=r2+h2=42+42=4 2=5.6569 m
S=π r s=3.1416 4 5.6569=71.0861 m2

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