In what time will a train 200 m long cross an electric pole, it its speed be 144 km/hr?
Choices.
A) 2.5 sec  B) 2.8 sec  C) 5 sec  D) 2.2 sec  E) 4.5 sec
Speed = 144 * 5/18= 
<gadget id="calculator">144 * 5/18</gadget>
<output>40</output>
40 m/sec   Time taken= 200/40= 
<gadget id="calculator">200/40</gadget>
<output>5</output>
5 sec.   Answer:5 sec
<result>C</result>
In what time will a train 200 m long cross an electric pole, it its speed be 144 km/hr?