10. Find the total surface area of a
cone, if its slant height is 21 m and
diameter of its base is 24 m.
O A) 1244.52 sq.m
O B) 1244.55 sq.m
Ο Ο Ο
O C) 1244.75 sq.m
O D) 1244.57 sq.m
Answers
Answered by
1
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 = d = 12 m.
2
Now,
the total surface area of cone is given by
S = πrl + πr²
S = π ( rl + r² )
S = π ( 12 × 21 + 12² )
S = π ( 252 + 144 )
S = 22
7
Hence, S = 1244.57m²
Answered by
1
Step-by-step explanation:
Given,
Slant height of cone is l = 21 m.
Diameter of its base is d=24 m.
hence,
radius of its base is r = d = 12 m.
2
Now,
the total surface area of cone is given by
S = πrl + πr²
S = π ( rl + r² )
S = π ( 12 × 21 + 12² )
S = π ( 252 + 144 )
S = 22
7
Hence, S = 1244.57m²
I hope you get help.
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