Akram while driving to office has speed of 80km/hr as his average speed on return along the same path his average speed is 40km/hr what is average speed of akram in whole journey.
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1
Average speed=
Total time
Total distance travelled
=
4
2
80×
4
1
+40×
4
1
=30×2=60km/hr
=60×
18
5
=
3
50
m/s=16.7m/s
Total time
Total distance travelled
=
4
2
80×
4
1
+40×
4
1
=30×2=60km/hr
=60×
18
5
=
3
50
m/s=16.7m/s
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