Question
Nick and Irene started driving at 11.50 a.m. from City X and headed towards City Y which was 324 km away. Nick took 4 hours to complete his journey. Irene's average speed was 9 km/h faster than Nick's. At what time did Irene arrive at City Y?
3 m

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Nick and Irene started driving at 11.50 a.m. from City X and headed towards City Y which was 324 km away. Nick took 4 hours to complete his journey. Irene's average speed was 9 km/h faster than Nick's. At what time did Irene arrive at City Y?