1 Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.
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1 Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.
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Right circular cone:
If a right angled triangle is revolved about one of the two sides forming a right angle keeping the other side fixed in position then the solid so obtained by segments is called right circular cone.
Slant height:
The length of the line segment joining the vertex to any point on a circular edge of the base is called the slant height of the cone.
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Given: Diameter= 10.5 cm
Radius (r) = 10.5/2 cm = 5.25 cm
Slant height (l) = 10 cm
Curved surface area of the cone = (πrl)
=(22/7 × 5.25 × 10)
=165 cm²
Hence, the curved surface area of a cone =165cm²
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Hope this will help you ..
Answer=165
22/7×525/100×10
after solving it we get ,
165 is ans.
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