Question
City A and City B is 840 km apart. At 06 40, Pamela, travelling at a constant speed, left City A for City B. At the same time, John set off from City B for City A at a constant speed which was 12 km/h faster than Pamela. Find John's speed if they met at 13 40.
3 m

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City A and City B is 840 km apart. At 06 40, Pamela, travelling at a constant speed, left City A for City B. At the same time, John set off from City B for City A at a constant speed which was 12 km/h faster than Pamela. Find John's speed if they met at 13 40.