Math, asked by bral, 1 year ago

a train 270m long is running at 80km/hr. how much time will be take to cross a bridge 130m long


bral: please give me my answer

Answers

Answered by sonabrainly
11

Speed of the train = 80 km/hr = 80 x 1000/3600 80 x 5/18 = 200/9 m/sec

Distance = length of the trian + length of the platform = 130 m + 270 m = 400 m


Time = Distance / Speed

= 400x9 / 200

= 2 x 9

= 18 sec.



Answered by vishaal013
2

SO WE HAVE TO FIND THE TIME THAT THE TRAIN TAKES TO CROSS THE BRIDGE:

80km/hr. = 22.2m/s

here we can find the answer simply by using velocity formula which is

⇒ v = distance/time

but the logic here is that the train completely passes the bridge only when the last tip of its last compartment is out. so we have to take the total distance as:

Length of bridge+ Length of train

= 270+130=400m

so the time taken is;

22.2 = 400/t

t= 18.01 sec

U R WELCOME!



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