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 1.5 km long?  Choose the most appropriate option.
A) 4
B) 3
C) 5
D) 7
E) 9
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= 3 mins   Answer: 3
<result>B</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 1.5 km long?