Question

A train 250m long passes a pole in 10 sec and a bridge in 25 sec. find the length of the bridge ?

Answer 1

Distance for crossing the pole = Length of the train = 250m


Time = 10s


We have distance and time so we can calculate the speed

Speed = Distance/Time

=> Speed = 250/10

=> Speed = 25m/s



In second case,

Speed = 25m/s (as we calculated above)

Time = 25s


So total distance = Speed × time
= 25 × 25
= 625m


But the total distance = length of train + length of bridge

=> 625 = 250 + length of bridge

=> length of bridge = 625 - 250

=> length of bridge = 375m


Answer :- 375m

Hope it helps dear friend ☺️

Answer 2

hy friend

     here is your solution

                                                                   

first step is

∴ Time        = 10 seconds

∴ Distance = 250m

      calculate formula        

Speed = Distance/time

Speed = 250/10

speed = 25m/s

Now in case of bridge

t = 25seconds,

Speed = 25m/s

→ Distance = length of train + length of bridge

  distance travelled = Speed × time

= 25 × 25 = 625metre

second step is

                                                                                                                     

→ distance = length of train + length of bridge (since the train crosses the bridge, its own length will also be added to get distance)

= 250 + length of bridge = 625

=  length of bridge

=  625 - 250

=  375m

   so        

Length of bridge is 375m

                                                                                                                           

                           thankyou

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