A bullet train 150 m long is running with a speed of 30 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the bullet train is going?	Choose the correct choice from the following answers:
A) 23 sec
B) 15 sec
C) 12 sec
D) 11 sec
E) 15 sec
E   15 sec   Speed of the bullet train relative to man = (30 + 6)= 
<gadget id="calculator">(30 + 6)</gadget>
<output>36</output>
36 *5/18 m/sec= 30/3 m/sec.   Time taken by the bullet train to cross the man = Time taken by it to cover 150 m at (30/3) m / sec   = (150 *3/30)= 
<gadget id="calculator">(150 *3/30)</gadget>
<output>15</output>
15 sec
<result>E</result>
A bullet train 150 m long is running with a speed of 30 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the bullet train is going?