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Earlier discussion
2 older comments kept for context.
Oluwaseun Adeyemi
Length of arc =
θ/360
* 2πr=> r =
90/360
* 14/4
= 3.5 slant height t = 14cm
curved surface area of cone = πrl
=> 3.142 x 3.5 x 14 = 153.95
SONIA OBENOBE
Where did u get the 4 u use in dividing 14 from?