SOLUTION: Working alone, Ryan can dig a 10ft by 10ft hole in 5 hours. Castle can dig the same hole in six hours. How long word it take them if they worked together?

Question 966399: Working alone, Ryan can dig a 10ft by 10ft hole in 5 hours. Castle can dig the same hole in six hours. How long word it take them if they worked together?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of working:
Ryan's rate:
[ 1 hole dug ] / [ 5 hrs ]
Castle's rate:
[ 1 hole dug ] / [ 6 hrs ]
------------------------
Let = their time in hrs working together

Multiply both sides by

It will take them 2 hrs 44 min working together
-------------------
check:

OK
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