25123.5325 square feet of tin is needed to make the roof
<em><u>Solution:</u></em>
Given that the roof of a farm silo is the shape of a hemisphere and is made of sheet tin
Given diameter of silo = 126.5 feet
<em><u>To find: sheet tin is needed to make the roof</u></em>
So we have to find the curved surface area of hemisphere
The curved surface area of hemisphere is given as:
Substitute r = 63.25 in above formula
Thus 25123.5325 square feet of tin is needed to make the roof