a car for half of its time at 80km/h and for rest half of time at 40 km/h. total distance covered is 60 km/h. what is the average speed of car find
avg speed=distancetotal/time
avgspeed=(.5t*80 + .5t*40)/t
=40+20=60km/hr
that is average speed. It doesn't matter what distance it traveled.