Asked by Michelle
The surface area of a right cone is 55π cm squared. Find the radius if the slant height is 6cm.
Answers
Answered by
random guy
S.A. = πr(r + 6)
55π = πr² + 6πr
55 = r² + 6r
r² + 6r - 55 = 0
(r + 11)(r - 5) = 0
r = 5 cm
55π = πr² + 6πr
55 = r² + 6r
r² + 6r - 55 = 0
(r + 11)(r - 5) = 0
r = 5 cm
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