Question
City X and City Y is 715 km apart. At 08 20, Mary, travelling at a constant speed, left City X for City Y. At the same time, Jeremy set off from City Y for City X at a constant speed which was 15 km/h faster than Mary. Find Jeremy's speed if they met at 13 20.
3 m

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City X and City Y is 715 km apart. At 08 20, Mary, travelling at a constant speed, left City X for City Y. At the same time, Jeremy set off from City Y for City X at a constant speed which was 15 km/h faster than Mary. Find Jeremy's speed if they met at 13 20.