(i) Expression for thickness t is t ≈ V_water/(4πR²) or ∛(R³ + 3V/(4π)) − R. (ii) Surface area is 4π(6371)² ≈ 510,064,472 km². Dividing 1.38 × 10⁹ by this area gives thickness t ≈ 2.705 km (or ~2705 m). Ganita Manjari ...
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For 8 billion people occupying roughly 0.07 m³ each, total human volume is about 560,000,000 m³. Taking the cube root of this volume gives a side length of approximately 824 metres, under 1 kilometre. Ganita Manjari Part 2 Class 9 Chapter ...
Yes, setting F = C = x gives x = (9/5)x + 32. Subtracting yields −(4/5)x = 32, so x = −32 × (5/4) = −40. Both scales are equal at −40°. Class 9 Maths (Ganita Manjari part two) Chapter 13 ...
For C = 0, F = (9/5)(0) + 32 = 32°F. For F = 0, 0 = (9/5)C + 32, giving C = −32 × (5/9) = −160/9 ≈ −17.78°C. Ganita Manjari Part 2 Class 9 Maths chapter 13 question answer
Substitute F = 95 into 95 = (9/5)C + 32. Subtracting 32 gives 63 = (9/5)C. Multiplying by 5/9 yields C = 63 × (5/9) = 35. The temperature is 35°C. Ganita Manjari Class 9 Maths part 2 Chapter 13 Solutions