SOLUTION: If a man takes 7 days to dig his garden and the son takes 4 days. How long would it take if they worked together?

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Question 767803: If a man takes 7 days to dig his garden and the son takes 4 days. How long would it take if they worked together?
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
1/7 + 1/4 =1/t

leads to
t=(4*7)/(4+7)=28/11

:)