Question

a train 150m long is running at 70 km per hour it crosses a bridge in 13 second find the length of the bridge

Answer 1

Heya user!!!!
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Good morning!!!!!!
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Here's your answer!!!!!!!!!!

By Formula, we know that :-

*Time taken by a train of length L1 m moving at a speed of S1 km/h to cross a bridge of length L2 m is given by :-
T=(L1+L2/S)*(18/5)s................

Now, formulating equation according to the formula, we get :-

L1=150m.......
S1=70km/h.........
T=13s.........
S2=x(let).............
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According to formula, we get :-
(150+x/70)*18/5=13
=>9(150+x)/35*5=13
=>9(150+x)=13*35*5
=>1350+9x=2275
=>9x=925
=>x=102.78m (approx)

Hence your answer is 102.78m...............

Hope this helps!!!!!!