A train is moving with a uniform speed. Train crosses a bridge of length 243 meters in 30 seconds and a bridge of length 343 meters in 36 seconds. What is the speed of the train?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 60 km/hr.
| Understanding/Application |
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Let the length of the train be T m. Speed of train = (T + 243)30 = (T + 343)/36 (T + 243)/5 = (T + 343)/6 6T + 1458 = 5T + 1715 T = 257 m |
| Speed of train = (257 + 243)/30 = 500/30 m/s = (50 × 18)/(3 × 5) = 60 km/hr |