If a train, travelling at a speed of 18 kmph, crosses a pole in 5 sec, then the length of train is?  Select the correct option.
A) 281 m
B) 25 m
C) 50 m
D) 125 m
E) 75 m
25 m   25 m = 18 * 5/18 * 5= 
<gadget id="calculator">18 * 5/18 * 5</gadget>
<output>25</output>
25 m
<result>B</result>
If a train, travelling at a speed of 18 kmph, crosses a pole in 5 sec, then the length of train is?