Question
City L and City M is 612 km apart. At 08 40, Betty, travelling at a constant speed, left City L for City M. At the same time, Peter set off from City M for City L at a constant speed which was 13 km/h faster than Betty. Find Peter's speed if they met at 12 40.
3 m

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City L and City M is 612 km apart. At 08 40, Betty, travelling at a constant speed, left City L for City M. At the same time, Peter set off from City M for City L at a constant speed which was 13 km/h faster than Betty. Find Peter's speed if they met at 12 40.