A plane flies 35 km in the direction N 30° W, then flies 60 km in the direction N 60° E. How far is the plane from its original location?

The directions N 30° W and N 60° E are 90° apart, so the two flight legs are perpendicular. Use the Pythagorean theorem: the distance from the starting point is √(35² + 60²) = √4825 ≈ 69.46 km, which is choice C.

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