Question

Pls answer the 14 question with steps!

Answer 1

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Answer 2

Answer:

Given, TSA of a right circular solid cone = 231 cm, it's CSA=2/3 TSA

⇒22/7 x r x l = 2/3 x 22/7 x r( l+r )

⇒ l = 2/3 (l+r)

⇒3(l) = 2l +2r

⇒ l = 2r                                                  ------------------------ 1.

⇒ TSA = 231

⇒22/7 x r ( l + r ) = 231

⇒ r ( 3r ) = 147 / 4                               ---------------------------(by 1.)

⇒ 3r² = 147 / 4

⇒ r² = 49 / 4

⇒ r = 7/2 cm or,

r = 3.5 cm