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Mathematics 8 Online
OpenStudy (anonymous):

A cone has a circular base of 6 radius mm and a curved surface area of 84 pie mmsquare.Find the slant height of the cone

OpenStudy (zehanz):

Hi, @JudeSharp009, I'll try to help you!|dw:1365325766550:dw| The circumference of the base circle is 2pi*6=12pi. The area of the "mantle" (don't know how you would call it) is 84pi. The circumference of the mantle, including the cut-out part would be 2pi*s It's area would be pi*s².

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