A train of 25 carriages, each of 60 meters length, when an engine also of 60 meters length is running at a speed of 60 kmph. In what time will the train cross a bridge 1.5 km long?  Choose the correct choice from the following answers:
A) 2 mins 14 sec  B) 2 mins 34 sec  C) 180 sec  D) 4 mins 54 sec  E) 2 mins 44 sec
D = 25 * 60 + 1500= 
<gadget id="calculator">25 * 60 + 1500</gadget>
<output>3_000</output>
3000 m   T= 3000/60 * 18/5= 
<gadget id="calculator">3000/60 * 18/5</gadget>
<output>180</output>
180 sec   ANSWER:180 sec
<result>C</result>
A train of 25 carriages, each of 60 meters length, when an engine also of 60 meters length is running at a speed of 60 kmph. In what time will the train cross a bridge 1.5 km long?