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Joe can paint a fence in 12 hours. Mack can paint it in 6 hours, how long will it take them to do it together?
i know the answer is 4, because someone told me to do 12 x 6, then divide by (12 + 6)
72/18 =4
Streetwolf, or anyone else, please explain the logic here. Why are you multiplying 12 and 6, then dividing by their sum?
i know the answer is 4, because someone told me to do 12 x 6, then divide by (12 + 6)
72/18 =4
Streetwolf, or anyone else, please explain the logic here. Why are you multiplying 12 and 6, then dividing by their sum?