Mathematics, 11.07.2019 02:00 mem81

Peter, paul and mary, whose walking rates are 1 ft/sec, 3 ft/sec and 6 ft/sec, start walking together in the same direction around a circular track that is 300 feet in circumference. after how many minutes are peter, paul and mary together again?

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Peter, paul and mary, whose walking rates are 1 ft/sec, 3 ft/sec and 6 ft/sec, start walking togethe...