A woman covers 30% of his 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.

A woman covers 30% of his 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

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