Using the cone volume formula V = (1/3)πr²h, we have 1570 = (1/3) × 3.14 × r² × 15. Simplifying gives 5 × 3.14 × r² = 1570, resulting in r² = 100, so r = 10 cm.
Ganita Manjari part 2 Chapter 14.1 Solutions
Class 9 Ganita Manjari Part 2 Chapter 14 Page 133 Question Answer
Given height h = 15 cm and volume V = 1570 cm³. The volume of a cone is given by V = (1/3)πr²h. Substituting the given values using π ≈ 3.14, we get 1570 = (1/3) × 3.14 × r² × 15. This simplifies to 15.7r² = 1570, giving r² = 100. Taking the square root, the base radius is r = 10 cm.
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