A man goes from A to B at a speed of 14 kmph and comes back to A at a speed of 10 kmph. Find his average speed for the entire journey?  Pick one: A) 11.6 kmph B) 12.9 kmph C) 12.8 kmph D) 11.9 kmph E) 12.6 kmph
Distance from A and B be 'd'   Average Speed = total distance/total time   Average Speed = (2d)/[(d/14) + (d/10]   = (2d)/[12d/70) =&gt; 11.6 kmph.   11.6 kmphnswer:11.6 kmph
<result>A</result>
A man goes from A to B at a speed of 14 kmph and comes back to A at a speed of 10 kmph. Find his average speed for the entire journey?