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Piyush365
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Asked: 2026-10-05T09:32:05+00:00 In:

The curved surface area of a cone is 308 cm² and its slant height is 14 cm. Find (i) the radius of the base, (ii) the total surface area of the cone.

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Using CSA = πrl = 308, (22/7) × r × 14 = 308 gives base radius r = 7 cm. Total surface area is πrl + πr² = 308 + (22/7) × 7² = 308 + 154 = 462 cm².

Ganita Manjari part 2 Chapter 14.1 Solutions
Class 9 Ganita Manjari Part 2 Chapter 14 Page 133 Question Answer

chapter 14 math of space surface area and volume solutionscurved surface area of a cone is 308 cm²download class 9 maths ganita manjari part 2 book and solutionsncert solutions – ganita manjari part ii math of space surface area and volumeslant height is 14 cmtotal surface area of the cone
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    1. Given CSA = 308 cm² and slant height l = 14 cm.
      For (i), curved surface area is πrl. Substituting gives (22/7) × r × 14 = 308, so 44r = 308, yielding base radius r = 7 cm.
      For (ii), total surface area is CSA + πr² = 308 + (22/7) × 7² = 308 + 154 = 462 cm².

       

      For more NCERT Solutions of Class 9 Maths Ganita Manjari Part 2 Chapter 14 Math of Space: Surface Area and Volume Question Answer (2026-27)

      https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-14/

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