Grade 12th pass9 grade maths
2. Find the total surfa,ce area of a cone, if its slant height is
21 m and diameter of its ba,se is 24 m.
2. Find the total surfa,ce area of a cone, if its slant height is
21 m and diameter of its ba,se is 24 m.
1 Answer
Pawan Prajapati
lbtal surface area = rr:rl + rr:r2 = nr( l + r)
= 722" x 12 x (21 + 12) cm2
= 1244.57 m2•
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