Question
Ian and Mary started driving at 11.36 a.m. from City E and headed towards City F which was 312 km away. Ian took 4 hours to complete his journey. Mary's average speed was 2 km/h faster than Ian's. At what time did Mary arrive at City F?
3 m

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Ian and Mary started driving at 11.36 a.m. from City E and headed towards City F which was 312 km away. Ian took 4 hours to complete his journey. Mary's average speed was 2 km/h faster than Ian's. At what time did Mary arrive at City F?