How much time does a train 110 metres long running at speed of 72 km/hr take to cross a bridge 132 metres in length?
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72 km per hour=(72×1000)÷3600=20∴(1`10+ 132)÷20=12.1
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Answer:
Explanation:
Speed = 72km/hr
= 72 * 1000
60* 60
= 72 * 5
18
= 20m/s
Total distance = 110 + 132
= 242 meters
Time = Distance / speed
Time = 242 / 20
Time = 12.1 seconds.
So the train takes 12.1 seconds to cross the bridge.
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