*Question 01*

**How long does a train 110 meters long running at a speed of 72 km/hr. take to cross a bridge 132 meters in length?**

Given, Length of the train = 110 meter

Length of the bridge = 132 meter

Total Length = (110 + 132) = 242 meter

Speed of the train = 72 km/hr.

= 72 x (5/18) meter/sec. = 20 meter/sec.

**Since, Speed of the train = (Length of the train + Length of the bridge)/Time taken to cross the bridge**

T**herefore, Time taken = (Total Length/Speed of the train) **

= (242/20) Sec.

= **12.1 seconds.**