In what time will a train 100 m long cross an electric pole, it its speed be 144 km/hr?	Choices:
A) 2.5 sec
B) 2.8 sec
C) 8.5 sec
D) 2.7 sec
E) 8.5 sec
Speed = 144 * 5/18= 
<gadget id="calculator">144 * 5/18</gadget>
<output>40</output>
40 m/sec   Time taken= 100/40= 
<gadget id="calculator">100/40</gadget>
<output>5/2 = around 2.5</output>
2.5 sec.   2.5 secnswer:2.5 sec
<result>A</result>
In what time will a train 100 m long cross an electric pole, it its speed be 144 km/hr?