The roof of the church

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

Correct answer:

s =  4.272 m
S =  20.1313 m2

Step-by-step explanation:

D=3 m h=4 m  r=D/2=3/2=23=1.5 m s=r2+h2=1.52+42=4.272 m
S=π r s=3.1416 1.5 4.272=20.1313 m2

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