# If hieght and radius of a cone are h and r respectively and it is given that hieght of the cone is same as diameter of the base then find the slant height

2
by Ishu111

2016-02-28T19:36:01+05:30

Now according to question h = 2r

Therfore

2016-02-28T20:20:13+05:30
(slant height) l² = r² + h²
l = √r² + h²
given,
diameter = height
or,      2r = h
l = r² + h²
or,      l = r² +(2r)²                              [because h=2r]
l = r² + 4r²
l = 5r²                     or             l = r×√5
therefore, slant height of the cone is 5r²
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there is one mistake plz correct it. the formula of slant height is l = √r² + h² but i had written l = r² + h² by mistakenly plz read it correctly and try to understand it properly