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# Find the Curved Surface Area of a Cone, If Its Slant Height is 60 Cm and the Radius of Its Base Is 21 Cm. - CBSE Class 9 - Mathematics

ConceptSurface Area of a Right Circular Cone

#### Question

Find the curved surface area of a cone, if its slant height is 60 cm and the radius of its base is 21 cm.

#### Solution

Given that
Radius of its base is 21cm
Slant height= 60cm

WKT, Curved surface area of a cone =pirl

∴ Curved surface area=22/7xx21xx60

=3960cm^2

Is there an error in this question or solution?

#### APPEARS IN

RD Sharma Solution for Mathematics for Class 9 by R D Sharma (2018-19 Session) (2018 to Current)
Chapter 20: Surface Areas and Volume of A Right Circular Cone
Ex.20.10 | Q: 1 | Page no. 7
Solution Find the Curved Surface Area of a Cone, If Its Slant Height is 60 Cm and the Radius of Its Base Is 21 Cm. Concept: Surface Area of a Right Circular Cone.
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