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# The Area of the Curved Surface of a Cone is 60 Cm2. If the Slant Height of the Cone Be 8 Cm, Find the Radius of the Base? - CBSE Class 9 - Mathematics

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ConceptSurface Area of a Right Circular Cone

#### Question

The area of the curved surface of a cone is 60 cm2. If the slant height of the cone be 8 cm, find the radius of the base?

#### Solution

Given that

Curved surface area of cone = 60picm^2

∴ Slant height of cone (l) = 8cm

i.e , pirl=60pi

⇒ pixxrxx8=60pi

⇒ r=60/8=7.5

∴ Radius of cone = 7.5cm

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: 8 | Page no. 8
Solution The Area of the Curved Surface of a Cone is 60 Cm2. If the Slant Height of the Cone Be 8 Cm, Find the Radius of the Base? Concept: Surface Area of a Right Circular Cone.
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