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## Explanation

How long does a train 110 meters take to cross a bridge 132 meters in length?

Total length = 110 + 132 = 242 meters

Speed is given in km/h but length is meters so speed will be changed to m/sec.

In order to figure out time

Time = distance/speed

## To Find

Time = ?

## Solution

Given speed = 72 km/h

Speed in m/sec = (72 x 1000)/3600

Speed in m/sec = 20 m/sec

Total length = 110 + 132 = 242 m

Now,

Time = distance/speed

Time = 242/20

**Time = 12.1 sec answer**

### Conclusion

A train 110 meters long running at the speed of 72 km/h takes **12.1 seconds** to cross a bridge 132 meters in length.