Question

what is the height of a cone of diameter 10 cm and slant height 13 cm.

Answer 1

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the formula to find the height is 

             l² = r²+h²

     h =√l²-r²

h=√169-25

h=√144

    h = 12 

               please mark as brainalist

Answer 2

since the cone that we consider is a right circular cone 

diameter=10 cm
radius=5 cm

slant height=13
which is equal to l

hence using the formula
h2=l2-r2
h2=13X13-5X5(I hope u understand)
h2=169-25
h2=144
taking square root on both sides
h=12