Question
Justin and Gabby started driving at 10.30 a.m. from City L and headed towards City M which was 312 km away. Justin took 4 hours to complete his journey. Gabby's average speed was 2 km/h faster than Justin's. At what time did Gabby arrive at City M?
3 m

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Justin and Gabby started driving at 10.30 a.m. from City L and headed towards City M which was 312 km away. Justin took 4 hours to complete his journey. Gabby's average speed was 2 km/h faster than Justin's. At what time did Gabby arrive at City M?