A car drives 215 km east and then 45 km north. What is the magnitude of the car's displacement? Round your answer to the nearest whole number.

Since the direction north is perpendicular to the direction east, the driver has covered the two legs of a right triangle. The hypotenuse is his displacement for the combination of the two segments.

D = √ (215² + 45²)

= √ (46,225 + 2,025)

= √48,250 = 219.6588 ... km

To the nearest whole number: 220 km