In what time will a train 175 m long cross an electric pole, it its speed be 180 km/hr?	Choose the correct option:
A) 7.5 B) 6.5 C) 5.5 D) 4.5 E) 3.5
Speed = 180 * 5/18= 
<gadget id="calculator">180 * 5/18</gadget>
<output>50</output>
50 m/sec   Time taken= 175/50= 
<gadget id="calculator">175/50</gadget>
<output>7/2 = around 3.5</output>
3.5 sec.   Answer: 3.5
<result>E</result>
In what time will a train 175 m long cross an electric pole, it its speed be 180 km/hr?