In what time will a train 100 m long cross an electric pole, it its speed be 90 km/hr?  Answers:
A) 2.5 sec
B) 2.8 sec
C) 8.5 sec
D) 2.2 sec
E) 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>E</result>
In what time will a train 100 m long cross an electric pole, it its speed be 90 km/hr?