In what time will a train 100 m long cross an electric pole, it its speed be 90 km/hr?	Choose the correct choice from the following answers:
A) 2.5 sec  B) 2.9 sec  C) 3.5 sec  D) 4 sec  E) 2.4 sec
Speed = 90 * 5/18= 
<gadget id="calculator">90 * 5/18</gadget>
<output>25</output>
25 m/sec   Time taken= 100/25= 
<gadget id="calculator">100/25</gadget>
<output>4</output>
4 sec.   Answer: 4 sec
<result>D</result>
In what time will a train 100 m long cross an electric pole, it its speed be 90 km/hr?