A train of 24 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 3.5 km long?  Choose one.
A) 4  B) 3  C) 5  D) 7  E) 9
D = 25 * 60 + 3500= 
<gadget id="calculator">25 * 60 + 3500</gadget>
<output>5_000</output>
5000 m   T= 5000/60 * 18/5= 
<gadget id="calculator">5000/60 * 18/5</gadget>
<output>300</output>
300 sec= 5 mins   Answer: 5
<result>C</result>
A train of 24 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 3.5 km long?