LudinTheVisionary LudinTheVisionary

09-10-2016
Mathematics

Answered

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

Verified Answer :

Ckaranja Ckaranja

09-10-2016

s=\(\pi rl+ \pi r^{2}\)
Making l the subject of the formula;
s-\(\pi r^{2} = \pi rl\)
Dividing each side by \(\pi r\)
\(\frac{s- \pi r^{2} }{ \pi r} =l\)
L=\(\frac{s- \pi r^{2} }{ \pi r}\)

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