Question
City J and City K is 654 km apart. At 09 35, Cathy, travelling at a constant speed, left City J for City K. At the same time, Billy set off from City K for City J at a constant speed which was 15 km/h faster than Cathy. Find Billy's speed if they met at 15 35.
3 m

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City J and City K is 654 km apart. At 09 35, Cathy, travelling at a constant speed, left City J for City K. At the same time, Billy set off from City K for City J at a constant speed which was 15 km/h faster than Cathy. Find Billy's speed if they met at 15 35.