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16 December, 01:01

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.

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  1. 16 December, 01:47
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    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
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