A vehicle covers first half of its total distance at a speed 20 kmph. And the other half of the distance at 40 kmph. The mean speed over the entire distance.

A vehicle covers first half of its total distance at a speed 20 kmph.

1.	A vehicle covers first half of its total distance at a speed 20 kmph. And the other half of the distance at 40 kmph. The mean speed over the entire distance.
Answer» 30 KMPH 50 kmph `(40)/(3)` kmph `(80)/(3)` kmph Answer :D