Question

A circular sheet of radius 18 cm is divided into 9 equal sectors. Find the slant height of cone which can be made by a sector.​

Answer 1

Answer:

18 cm as radius of circle = slant height

lsa πrl

so 22/7*r*18

to find r

1/9*2*22/7*18=2

so csa of cone 36π

Answer 2

The slant height of cone=18 cm

Step-by-step explanation:

Radius of circular sheet=18 cm

Number of equal sector=9

We know that

Area of circle=$\pi r^2$

Where r= Radius of circle

$\pi=\frac{22}{7}$

Using the formula

Area of circle=$\frac{22}{7}\times (18)^2$

Area of one sector=$\frac{1}{9}\times \frac{22}{7}\times (18)^2=113.1cm^2$

Slant height of cone=Radius of circular sheet

Therefore, slant height of cone=18 cm

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