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Find the area of right circular cone
curved surface if slant height is 20 m
and height is 16 m.
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Answer:
Given,
Slant height of cone is l=21 m.
Diameter of its base is d=24 m.
hence, radius of its base is r=
2
d
=12 m.
Now, the total surface area of cone is given by
S=πrl+πr
2
S=π(rl+r
2
)
S=π(12×21+12
2
)
S=π(252+144)
S=
7
22
×396
hence, S=1244.57 m
2
Step-by-step explanation:
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