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1. How long does a train 110 metres long running at the speed of 72 km/hr take to cross a bridge 132 metres in length?
- A. 9.8 sec
- B. 9.8 sec
- C. 9.8 sec
- D. 9.8 sec
Answer: Option B
Explanation:
Hints: To convert km/hr into m/s, multiply with 5/18
So, 72km/hr = (72×5)/ 18 m/s = 20 m/s
Time required to cross the bridge = (110 + 132)/20 seconds = 12.1 seconds
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