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Final answer:

The resultant velocity of the car can be calculated using vector addition and the Pythagorean theorem, resulting in a velocity of approximately 122.06 km/h.


Explanation:

The resultant velocity of the car can be found using vector addition.

Applying the Pythagorean theorem, we get the resultant velocity = sqrt((velocity north)^2 + (velocity east)^2).

For this scenario, the resultant velocity = sqrt((100 km/h)^2 + (70 km/h)^2) = sqrt(10000 + 4900) = sqrt(14900) ≈ 122.06 km/h.


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