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| 1. |
The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is: |
| Answer» Speed = 45 x 5 m/sec = 25 m/sec. 18 2 Time = 30 sec. Let the length of bridge be x metres. Then, 130 + x = 25 30 2 2(130 + x) = 750 x = 245 m. Video Explanation: https://youtu.be/M_d8WufJWKc | |