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What is the ratio between time taken by a train 280m long to cross an electric pole and a bridge of 70m length?1. 4 : 12. 4 : 53. 5 : 44. 4 : 3 |
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Answer» Correct Answer - Option 2 : 4 : 5 Given: Length of train = 280 m, and length of bridge = 70 m Concept: When speed is constant, the ratio of time is equal to the ratio of distance Calculation: When train crosses an electric pole, then The distance covered by train = 280 m When train crosses a bridge, then The distance covered by train = 280 + 70 = 350 m Now, The ratio of time taken by a train crosses an electric pole and a bridge ⇒ 280 : 350 ⇒ 4 : 5 ∴ The required ratio is 4 : 5. |
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