Question
Ian and Shiyun started driving at 10.44 a.m. from City D and headed towards City E which was 280 km away. Ian took 4 hours to complete his journey. Shiyun's average speed was 10 km/h faster than Ian's. At what time did Shiyun arrive at City E?
3 m

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Ian and Shiyun started driving at 10.44 a.m. from City D and headed towards City E which was 280 km away. Ian took 4 hours to complete his journey. Shiyun's average speed was 10 km/h faster than Ian's. At what time did Shiyun arrive at City E?