Question
Xavier and Erika started driving at 11.31 a.m. from City W and headed towards City X which was 312 km away. Xavier took 4 hours to complete his journey. Erika's average speed was 2 km/h faster than Xavier's. At what time did Erika arrive at City X?
3 m

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Xavier and Erika started driving at 11.31 a.m. from City W and headed towards City X which was 312 km away. Xavier took 4 hours to complete his journey. Erika's average speed was 2 km/h faster than Xavier's. At what time did Erika arrive at City X?