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 ...
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The slant height is √(16² + 12²) = 20 cm. The curved surface area is πrl = 3.14 × 12 × 20 = 753.6 cm² and total surface area is 753.6 + π(12)² = 1205.76 cm². Ganita Manjari part 2 Chapter ...
Using base radius r = 7 cm and slant height l = 10 cm, the curved surface area formula πrl gives (22/7) × 7 × 10 = 220 cm². CBSE Class 9 Ganita Manjari part 2 Chapter 14 Solutions Class 9 ...
Given slant height is 21 m and diameter 24 m, the radius is 12 m. The total surface area formula πr(l + r) gives (22/7) × 12 × 33 = 1244.57 m². CBSE Class 9 Ganita Manjari part 2 Chapter 14 ...
(i) Cube volume is 12³ = 1728 cm³. (ii) Rod volume is (22/7) × 2² × 12 = 1056/7 ≈ 150.86 cm³. (iii) Number of complete rods is 1728 ÷ (1056/7) = 11.45, giving 11 complete rods. Class 9 Chapter 14 ...