In what time will a train 320 m long cross an electric pole, it its speed be 144 km/hr?	Choose the correct choice from the following:  A) 2.5 sec  B) 8.0 sec  C) 3.5 sec  D) 2.9 sec  E) 9.5 sec
Speed = 144 * 5/18= 
<gadget id="calculator">144 * 5/18</gadget>
<output>40</output>
40 m/sec   Time taken= 320/40= 
<gadget id="calculator">320/40</gadget>
<output>8</output>
8.0 sec.   Answer: 8.0 sec
<result>B</result>
In what time will a train 320 m long cross an electric pole, it its speed be 144 km/hr?