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The radii of two cylinders are in the ratio 3 : 4 and heights are in the ratio 5 : 7. What is the ratio of their volumes?1. 4 : 92. 15 : 283. 47 : 534. 45 : 112 |
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Answer» Correct Answer - Option 4 : 45 : 112 Given: Radii of two cylinder are in the ratio = 3 : 4 Heights of two cylinder are in the ratio = 5 : 7 Formula: Volume of cylinder = πr2h Calculation: r1 = 3, r2 = 4, h1 = 5 and h2 = 7 Volume of first cylinder = V1 Volume of second cylinder = V2 ⇒ V1 / V2 = (π × 32 × 5) / (π × 42 × 7) ⇒ V1 / V2 = 45 / 112 ∴ V1 : V2 = 45 : 112 |
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