Question
Ethan and Risa started driving at 11.49 a.m. from City R and headed towards City S which was 243 km away. Ethan took 3 hours to complete his journey. Risa's average speed was 9 km/h faster than Ethan's. At what time did Risa arrive at City S?
3 m

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Ethan and Risa started driving at 11.49 a.m. from City R and headed towards City S which was 243 km away. Ethan took 3 hours to complete his journey. Risa's average speed was 9 km/h faster than Ethan's. At what time did Risa arrive at City S?