Car A drives west from point A at 30 kph. Another car B starting from B at the same time, drives S.30'W toward A at 60 kph. B is 40 km away from A. How far apart are the 2 cars after 30 minutes? Select one: O a. 12.84 km O b. 22.18 km O c. 13.23 km O d. 21.79 km

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