RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 20. Surface Area and Volume of a Right Circular Cone

Subject: Mathematics - Class 9th

Q. No. 6 of Exercise 20.1

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Find the curved surface area of a cone with base radius 5.25 cm and slant height 10 cm.


Base radius of cone (r )= 5.25 cm

Slant height of cone ( l )= 10 cm

Curved surface area =πrl

= ×5.25×10 cm2=165 cm2

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