If a train, travelling at a speed of 90 kmph, crosses a pole in 4 sec, then the length of train is? Choose the correct choice from the following answers:
A) 281
B) 125
C) 288
D) 100
E) 121
100 = 90 * 5/18 * 4= 
<gadget id="calculator">90 * 5/18 * 4</gadget>
<output>100</output>
100 m   Answer: 100
<result>D</result>
If a train, travelling at a speed of 90 kmph, crosses a pole in 4 sec, then the length of train is?