SOLUTION: John can cut the grass in 4 hours working by himself. When John cuts the grass with his younger brother Dino, it takes 3 hours. How long would it take for Dino to cut the grass if
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-> SOLUTION: John can cut the grass in 4 hours working by himself. When John cuts the grass with his younger brother Dino, it takes 3 hours. How long would it take for Dino to cut the grass if
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Question 1087709: John can cut the grass in 4 hours working by himself. When John cuts the grass with his younger brother Dino, it takes 3 hours. How long would it take for Dino to cut the grass if he worked by himself? Answer by ikleyn(52857) (Show Source):
Their combined rate of work is of the job per hour.
John's individual rate of work is of the job per hour.
Hence, Dino's individual rate of work is = = of the job per hour.
It means that Dino can make all the job in 12 hours working alone.
