Question

a train 150 long takes 13 sec to cross a bridge and running with a speed of 20m/sec find the lenght of bridge ?

Answer 1

Time taken to cross the bridge = 13 sec

Speed of the train= 20m/Sec

Distance travelled in 13 sec= Speed*time
= 20*13= 260m

But the train itself is 150 m long hence when the train exits the bridge it's measured from the back end of the train hence

the length of bridge= distance travelled- length of train = 260-150= 110m is the length of the bridge.


Hope this helps.