Math, asked by watson19, 1 year ago

in a right circular cone, if the perpendicular height is 12cm and radius is 5cm, find its slant height

Answers

Answered by sagarmankoti
5

Slant \: height, \: l =  \sqrt{ {h}^{2}  +  {r}^{2} }  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   =  \sqrt{ {12}^{2} +  {5}^{2}  }  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \sqrt{144 + 25}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \sqrt{169}  \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   = 13 \: cm


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Answered by preeti9578
7

Answer:

Step-by-step explanation:

h=12cm

r=5cm

let slant height be   l

we know that

l=√h²+r²

l=√(12)²+5²

l=√144+25

l=√169

l=13cm

hope it helps


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