InterviewSolution
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If a ∶ b = 3 ∶ 2, b ∶ c = 5 ∶ 7 and d ∶ c = 3 ∶ 4. Then find a ∶ b ∶ c ∶ d.1. 17 ∶ 20 ∶ 28 ∶ 132. 28 ∶ 20 ∶ 22 ∶ 213. 30 ∶ 20 ∶ 28 ∶ 214. 30 ∶ 25 ∶ 28 ∶ 27 |
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Answer» Correct Answer - Option 3 : 30 ∶ 20 ∶ 28 ∶ 21 Given: a ∶ b = 3 ∶ 2 b ∶ c = 5 ∶ 7 c ∶ d = 4∶ 3 Calculation: a ∶ b ∶ c ∶ d 3 ∶ 2 ∶ 2 ∶ 2 5 ∶ 5 ∶ 7 ∶ 7 4 ∶ 4 ∶ 4 ∶ 3 ⇒ (3 × 5 × 4) ∶ (2 × 5 × 4) ∶ (2 × 7 × 4) ∶(2 × 7 × 3) ⇒ 60 ∶ 40 ∶ 56 ∶ 42 ⇒ 30 ∶ 20 ∶ 28 ∶ 21 ∴ a ∶ b ∶ c ∶ d =30 ∶ 20 ∶ 28 ∶ 21 The correct option is 3 i.e.30 ∶ 20 ∶ 28 ∶ 21 |
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