A girl walks 4 km towards west, then she...

A girl walks 4 km towards west, then she walks 3 km in a direction `30^(@)` east of north and stops. Determine the girl’s displacement from her initial point of departure.

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The correct Answer is:

`(-5)/(2)hati+(3sqrt(3))/(2)hatj`

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A girl walks 4 km towards west, then she walks 3 km in a direction `30^(@)` east of north and stops. Determine the girl’s displacement from her initial point of departure.

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