Question

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If the area of the base of a right circular cone is 9856 cm2 and its height is 33cm, what is the curved surface
area of the cone?
O 11440 cm2
21
O 21040 cm2
1600831161 21
160083/1672
60080
O 12420 cm2
O 12000 cm2
16008371672
Clear Response​

Answer 1

Answer:

hello darling..

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Answer 2

Answer:

a) 11440cm²

Step-by-step explanation:

curved surface area of cone= πrl

where l = slant height, r= radius

given: area of base= πr²= 9856

22/7*r²=9856 => r²= 9856*7/22

r²=3136 => r= √3136= 56. (1)

in right circular cone

(slant height)²= (height)²+(radius)²

x²= (33)²+(56)² => x²= 1089+3136

x²= 4225 => x=√4225 = 65 , slant height is 65 cm

putting the value of l and r in formula of curved surface area of cone = π*56*65

=> 22/7*56*65=11440 cm².