The radius of a cone is 5cm and vertical height is 12 cm, find the area of the curved surface
Answers
Answered by
2
Answer:
A≈282.74cm²
Step-by-step explanation:
A=πrl+πr2
l=r2+h2
Solving forA
A=πr(r+h2+r2)=π·5·(5+122+52)≈282.74334cm²
Answered by
3
Answer: 282 cm^2
Step-by-step explanation:
1) Curved surface area of a cone is πr^2 + πrl
2) given :-
h = 12 cm
r = 5 cm
l = √ h^2 + r^2
= √ 144 + 25
= √169
= 13 cm
3) Substituting the value in the formula
= π (5)^2 + π (5)(13)
= π ( 25 + 65)
= 3.14 x 90
= 282.6 cm^2
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