Question

Find the radius of a cone given the surface area and slant height. Round to the nearest tenth.

Surface Area = 359 ft^2
Slant height = 15 ft

Answer 1

\[Surface \space Area = (\pi)(r)(l) \]
l-->slant height
r-->radius

Now try :D

Answer 2

Surface area of a cone is given by the following formula:\[\pi rl+\pi r ^{2}\]

Answer 3

@kropot72
Total surface area of cone is given by
\[\pi rl+\pi r ^{2}\]

\[Surface \space Area = (\pi)(r)(l)\]

Answer 4

Point taken. The question does not mention the area of the base. So by implication the base area can be considered to be excluded.

Answer 5

Surface area includes the area of the base. Otherwise, the question would have specified lateral area.

Answer 6

Thank you for clarification Directrix.

Answer 7

Thanks Directrix for clarifying