Discussion
A car travels 15 km east, turns left and travels 10 km, turns left again and travels 15 km, then turns right and travels 5 km. How far and in which direction is it from the start ?
Answer: A
Correct answer: 15 km north
The turns give the sequence east, north, west, north. The 15 km east and 15 km west cancel, while the northward legs add.
\[10 + 5 = 15 \text{ km towards the north}\]
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