SOLUTION: Working alone, Ryan can dig a 10ft. by 10 ft. hole in five hours. Castel can dig the same hole in six hours. How long would it take them if they worked together?

Question 670594: Working alone, Ryan can dig a 10ft. by 10 ft. hole in five hours. Castel can dig the same hole in six hours. How long would it take them if they worked together?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

How long would it take them if they worked together?

Working together:  PER hr KEY

 

     6x + 5x = 30

       11x = 30hr

         x = 2.7 hr   (rounded to the nearest tenth) 

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