Question
City X and City Y is 678 km apart. At 09 20, Fanny, travelling at a constant speed, left City X for City Y. At the same time, Harry set off from City Y for City X at a constant speed which was 15 km/h faster than Fanny. Find Harry's speed if they met at 15 20.
3 m

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City X and City Y is 678 km apart. At 09 20, Fanny, travelling at a constant speed, left City X for City Y. At the same time, Harry set off from City Y for City X at a constant speed which was 15 km/h faster than Fanny. Find Harry's speed if they met at 15 20.