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Two trains length 70 m and 90 m are moving in opposite directions at 10 m/s and 6 m/s respectively. Find the time taken by trains to cross each other.1. 10 sec2. 6 sec3. 8 sec4. 5 sec5. None of these |
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Answer» Correct Answer - Option 1 : 10 sec Given: Length of first train = 70 m Length of second train = 90 m Speed of first train = 10 m/s Speed of second train = 6 m/s Formula Used: Speed = Distance/Time Concept Used: When two trains are moving in opposite direction their length and speed be added. Calculation: Total length of both train = 70 + 90 =160 m Total speed of both train = 10 + 6 = 16 m/s ∴ Time taken by trains to cross each other = 160/16 = 10 sec. |
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