Hiroto paid $4.28 in sales tax for the items that he purchased. If the sales tax rate was 6.25 percent, what was the total cost
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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.