Correct Answer - Option 2 : 7 seconds

**Given:**

Length of train = 95 m

Speed of train = 126 km/ h

Length of bridge = 150 m

**Formula used:**

Speed = Distance/ Time

m/ s = 5/ 18 km/hr

Speed of train = (Length of train + length of bridge)/ Time

**Calculation:**

Speed of train = 126 × 5/ 18

⇒ Speed of train = 35 m/ s

Speed of train = (95 + 150)/ time

⇒ Time taken = 245/ 35

⇒ Time taken = 7 seconds

**∴**** Time taken to cross the bridge is 7 seconds**