If the slant height of a cone is
21 cm and diameter of the base is 24 cm, the total surface area of the cone is?
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Answer:
1244.57 cm2
Step-by-step explanation:
Total surface area of a cone = π × r × (l + r)
Slant height of the cone, l = 21 cm.
Diameter of the cone = 24 cm
So, Radius of the cone , r = 12 cm
Take π = 22/7
Total surface area of the cone = 22/7 × 12 × (21 + 12)
= 22/7×12 ×33
= 1244.57 cm2
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