A man goes from A to B at a speed of 20 kmph and comes back to A at a speed of 30 kmph. Find his average speed for the entire journey?
Choose the correct choice from the following options
A) 24 kmph	B) 22 kmph	C) 23 kmph	D) 21 kmph	E) 25 kmph
24 kmph   24 kmph   Distance from 24 kmph and B be 'd'   24 kmphverage Speed = total distance/total time   24 kmphverage Speed = (2d)/[(d/20) + (d/30)]   = (2d)/[5d/60) =&gt; 24 kmph.
<result>A</result>
A man goes from A to B at a speed of 20 kmph and comes back to A at a speed of 30 kmph. Find his average speed for the entire journey?