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## Explanation

“A train 360 meter long is running at a speed of 45 km/h”.

This statement shows speed is needed to convert into m/sec because train of length is given which is also in meter.

To calculate the time; speed distance formula will be used,

Time = Distance/Speed

Considering the total length = 360 + 140 = 500 meter

## To Find

Time = ?

## Solution

Given speed = 45 km/h

Speed in m/sec = (45 x 1000)/3600

Speed in m/sec = 12.5 m/sec

Total length = 360 + 140 = 500 m

Now,

Time = distance/speed

Time = 500/12.5

**Time = 40 seconds answer**

### Conclusion

A train 360 meter long is running at a speed of 45 km/h. In **40 seconds** it will pass a bridge 140 meter long.