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l=square root of r^2+h^2
r=radius of the cone
h=height of the cone
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thanks. but i think i will need it in an detailed manner.
again how much detail ya..it is clear na..
no my taechers asked me to explain with a diagram...
u could ask it correctly in the question no...
l=slant ht.
We consider a right angled triangle formed in the cone to drive the formula for slant height of cone having slant height =l ; base=radius=r and height =h .
We get :
l= under root✓l^2+ r^2 units.
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