Question

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?

Answer 1

72 km per hour=(72×1000)÷3600=20∴(1`10+ 132)÷20=12.1

Answer 2

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.