Time taken by a train 70 metres long to cross a bridge of length 105 metres with a speed of 75 kmph is

Given:

Length of train (L_train) = 70 metres

Length of bridge (L_bridge) = 105 metres

Speed of train (S) = 75 kmph

Formula used:

Total Distance (D) = Length of train + Length of bridge

Time (T) =

Calculations:

⇒ S = 75 kmph = 75 × m/s

⇒ S = m/s (dividing 75 and 18 by 3)

⇒ S = m/s

⇒ Total Distance = L_train + L_bridge

⇒ Total Distance = 70 m + 105 m = 175 m

⇒ Time =

⇒ Time =

⇒ Time =

⇒ Time =

⇒ Time = seconds =  sec

∴ The time taken by the train to cross the bridge is seconds.