A person walks at 5kmph for 6hr and at 4kmph for 12hr. The average speed is.
3 mph
2 1/3mph
4 1/3 mph
3 1/6mph
Explanation:
avg speed = total distance/total time
= 5*6 + 4*12 / 18
=4 1/3 mph
avg speed = total distance/total time
= 5*6 + 4*12 / 18
=4 1/3 mph