Answers

2016-03-31T21:31:36+05:30
Average speed = total distance / total time
time = distance / speed
6 km / 4 kmph
1.5 hrs

4 km / 3 kmph
1.34 hrs

6 km + 4 km/ 1.5 hrs + 1.34 hrs
10 km / 1.84 hrs
5.43 kmph
0