A train that is 110 m in length is running at 90 km/h. How much time will the train take to cross a bridge that is 180 m in length?

Length of the train = 110 m

Length of the bridge = 180 m

Speed of the train = 90 km/h

To cross the bridge completely, the train must cover a distance equal to the sum of its own length and the length of the bridge. The time taken to cross the bridge can be found using the formula:

​$$\text{Time} = \frac{\text{Total Distance}}{\text{Speed}}$$​​

To Convert km/h to m/sec.

​$$\text{km/h}\times \frac{5}{18} = \text{m/sec}$$​​