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0. In going from one city to another, a car whose r tends to get lost goes 30 km north, 50 km rive west, and 20 km southeast. Approximately how far apart are the cities? 13. A car whose acceleration is constant reaches a eed of 80 km/h in 20 s starting from rest. How much more time is required for it to reach a eed of 130 km/h?
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