LudinTheVisionary LudinTheVisionary
  • 10-10-2016
  • Mathematics
contestada

use the formula for the total surface area of a cone to solve for the slant height l S=πrl+πr^2

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Ckaranja
Ckaranja Ckaranja
  • 10-10-2016
s=[tex] \pi rl+ \pi r^{2} [/tex]
Making l the subject of the formula;
s-[tex] \pi r^{2} = \pi rl[/tex]
Dividing each side by [tex] \pi r[/tex]
[tex] \frac{s- \pi r^{2} }{ \pi r} =l[/tex]
L=[tex] \frac{s- \pi r^{2} }{ \pi r} [/tex]
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