Question

train running at 63 kilometre per hour crosses an electric pole in 12 seconds and a bridge in 30 seconds find the length of the train and the length of the bridge ​

Answer 1

Answer:

Speed of train = 63 x(5/18) = 35/2 m/s

Time taken to cross electric pole = 12 sec

Time taken to cross bridge = 30 sec

Total time taken = (12 +30) = 42 sec

Now,

a) Length of train = (speed x time) = ( 35/2 x 42) = 735 m Total length of train is 735 m

b) Length of bridge = (speed x time) = (35/2×30) = 525 m