Difficulty: Easy
Correct Answer: 15 km
Explanation:
Coordinate setup
Home = (0,0)10 km South ⇒ (0, −10)Right (from South) = West 5 ⇒ (−5, −10)Right (from West) = North 10 ⇒ (−5, 0)Left (from North) = West 10 ⇒ (−15, 0)
Straight-line back to home
Distance = |x| = 15 km.
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