A coin dealer is having paper wraps made to go around a stack of coins. The coins have a diameter of 12 mm, and the dealer state
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Given:
Radius of the cone = 5 ft
Slant height of the cone = 21 ft
To find:
The surface area of the cone
Solution:
Surface area of cone formula:
where r is the radius and l is the slant height.
The surface area of the cone is 130π square feet.