Question

A semicircular sheet of metal of diameter 28 cm is bent to form a conical cup.
Find slant height of the cup.

Answer 1

Answer:

if pi=22/7

circumference of cone=circumference of semi circle

2×pi×14/2pi×r=pi×14

r=7cm

slant height =radius of semicircular plate

l=14cm

h^2=l^2-r^2

=14^2-7^2

=196-49

=147

h=root 147

=7 root 3

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