The smallest enclosing cylinder for a sphere of radius r has base radius r and height 2r, with volume 2πr³. The sphere volume is (4/3)πr³, exactly two-thirds of the cylinder’s volume. Class 9 Ganita Manjari Part 2 book Chapter 14 Question ...
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Volume ratio equals the cube of radius ratio. (i) Jupiter to Earth: (69,900/6,370)³ ≈ 1321. (ii) Sun to Earth: (6,95,700/6,370)³ ≈ 1,303,000. Class 9 Ganita Manjari part 2 Chapter 14 end of chapter exercise Solutions Class 9 Ganita Manjari Part II ...
Sphere surface area = 4π(5)² = 100π cm². Since this is five times the cone CSA, cone CSA = 20π cm². Thus, π(4)l = 20π, giving l = 5 cm. Cone height is 3 cm and volume is 16π cm³. Cbse ...
With radius 3.5 cm and height 12 cm, one glass holds (22/7) × 3.5² × 12 = 462 cm³. For 1600 students, total milk is 1600 × 462 = 739,200 cm³ = 739.2 litres. Ganita Manjari Part 2 Class 9 Chapter ...
Assuming a world population of 8 billion and each standing person occupying about 0.25 m², total area is 8,000,000,000 × 0.25 = 2,000,000,000 m² = 2,000 km², roughly the area of a large city. Class 9 Ganita Manjari Part 2 book ...