A circular sheet of radius 20cm is split up into 4 equal sectors.One of them is rolled into a cone. a) What is the slant height of the cone ? b) What is the radius of the cone?
Answers
Answered by
1
Step-by-step explanation:
Radius of the circular sheet 36cm
a. Slant height of the cone =36cm
b.Radius of the cone r=
1
r
=
36
x
(formula) centre angel (x) =360/4=90
o
i.e.,
36
r
=
360
90
r=
360
36×90
=9cm
Hence,the radius of the cone =9cm
c.Curved surface are (CSA)=πrl
π×9×36=324πcm
2
324×3.14=1017.36cm
2
Similar questions