A man goes from A to B at a speed of 15 kmph and comes back to A at a speed of 12 kmph. Find his average speed for the entire journey?	Answers:  A) 13.7 kmph  B) 13.3 kmph  C) 13.8 kmph  D) 13.9 kmph  E) 12.3 kmph
Distance from A and B be 'd'   Average Speed = total distance/total time   Average Speed = (2d)/[(d/15) + (d/12]   = (2d)/[9d/60) =&gt; 13.3 kmph.   Answer:13.3 kmph
<result>B</result>
A man goes from A to B at a speed of 15 kmph and comes back to A at a speed of 12 kmph. Find his average speed for the entire journey?