RD Sharma - Mathematics

Book: RD Sharma - Mathematics

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

Subject: Mathematics - Class 9th

Q. No. 3 of Exercise 20.1

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3

The radius of a cone is 7 cm and area of curved surface is 176 cm2. Find the slant height.

Given,


Radius of base (r) = 7 cm


Area of curved surface = πrl = 176 cm


22/7×7×l = 176 = l = 8 cm


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