Question
Andy and Barbara started driving at 10.43 a.m. from City C and headed towards City D which was 280 km away. Andy took 4 hours to complete his journey. Barbara's average speed was 10 km/h faster than Andy's. At what time did Barbara arrive at City D?
3 m

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Andy and Barbara started driving at 10.43 a.m. from City C and headed towards City D which was 280 km away. Andy took 4 hours to complete his journey. Barbara's average speed was 10 km/h faster than Andy's. At what time did Barbara arrive at City D?