A woman covers 30% of her journey by car at 60km/h, next 45% by car at 45km/h, next 15% by car at 60km/hr and rest by walking 5km/h. Find her average speed during the whole journey.
1
200/16 km/h
2
120/17 km/h
3
200/13 km/h
4
400/15 km/h
5
200/16k m/h