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The ratio of the speed of three Motorbike racers is 10 ∶ 7 ∶ 2. What is the ratio of time taken by the three bike racers to cover the same distance?1. 7 ∶ 10 ∶ 192. 9 ∶ 5 ∶ 163. 7 ∶ 10 ∶ 354. 14 ∶ 17 ∶ 9 |
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Answer» Correct Answer - Option 3 : 7 ∶ 10 ∶ 35 Given: Speed of three Motorbike racers = 10 ∶ 7 ∶ 2 Concept used: Time = Distance/Speed Calculation Let, distance be x Ratio of time taken by motorbike first, second and third = (x/10) ∶ (x/7) ∶ (x/2) ⇒ 140 × (x/10) ∶ 140 × (x/7) ∶ 140 × (x/2) ⇒ 14x ∶ 20x ∶ 70x = 7 ∶ 10 ∶ 35 ∴ The ratio of time taken by motorbike first, second and third is 7 ∶ 10 ∶ 35 |
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