Question

the circumference of the base of a right circular cone is 44 cm and its slant height is 10 cm. find the curved surface area

Answer 1

↑ Here is your answer ↓
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Given,

Circumference of the base,

$2 \pi r = 44$

$\pi r = 22$

$r = 22 * 7/22$

'22' get cancelled out,

$r = 7cm$

C.S.A of a right circular cone,

$= \pi * r* l$

$= 22/7 * 7 * 10$

'7' is cancelled out,

So,

$= 220 cm^2$

Answer 2

heya dear,

here your amswer goes like this

Given,

Circumference of the base of the right circular cone = 44cm

circumference is nothing but boundary

so here the length of the boudary iz 44cm

》2 × (pi) × r = 44cm

》 2 × (22/7) × r = 44cm

》44/7 × r = 44

* by transposing (44/7) which is in LHS to RHS it will be (7/44) *

so now

r = 44 × 7/44

by canceling both numerator and denominatior

we get

r=7cm

curved surface area of cone (C.S.A) = r × pi × l

》7 × (22/7) × 10

*by canceling both numerator amd denominationr we get*

CSA =22×10

CSA =220sq.cm

i hope it helped you thanks