Question

What is the surface area, in square meters, of a cone with a slant height of 8 meters and a radius of 5 meters? Use 3.14 for pi and round to the nearest tenth, if necessary.(1 point)
___ square meters

Answer 1

Surface area = πr^2 + πrl. With r = 5, l = 8, π = 3.14:
πr^2 = 3.14(5^2) = 3.14(25) = 78.5
πrl = 3.14(5)(8) = 3.14(40) = 125.6
Total = 78.5 + 125.6 = 204.1

204.1 square meters