A man goes from A to B at a speed of 60 kmph and comes back to A at a speed of 40 kmph. Find his average speed for the entire journey?  Choose the correct option.
A) 49 kmph B) 58 kmph C) 44 kmph D) 47 kmph E) 48 kmph
Distance from A and B be 'd'   Average Speed = total distance/total time   Average Speed = (2d)/[(d/60) + (d/40]   = (2d)/[5d/120) =&gt; 48 kmph.   Answer:48 kmph
<result>E</result>
A man goes from A to B at a speed of 60 kmph and comes back to A at a speed of 40 kmph. Find his average speed for the entire journey?