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To find how long it would take Anita and Chao working together to clean a typical pool, we can use the formula:
1 / (time for Anita + time for Chao)
1 / (1/8 + 1/6)
1 / (3/24 + 4/24)
1 / (7/24)
24 / 7
Therefore, it would take Anita and Chao working together 24/7 hours to clean a typical pool.