Question

a 250 metre long train is moving at a at a constant speed of 72 km per hours how much time will it take to cross a bridge 150 metre long​

Answer 1

Answer:

It will take 20 sec.

Step-by-step explanation:

WE first convert the speed to meter per sec.

So we multiply by 5/18,we get 20 m/s.

Now the train has to cross the bridge which is 150 m long,but its a train so it also has a length.So the train has to cross the bridge with not even a single bogey left behind right...

So therefore total distance is 400m and time distance upon speed.

Therefore the answer is 20 sec.