SOLUTION: Together, Bob and Tom take 4 hours to get the yard work done. If Bob works alone, it takes him 6 hours. How long would it take Tom, working alone, to do all of the yard work?

Question 457478: Together, Bob and Tom take 4 hours to get the yard work done. If Bob works alone, it takes him 6 hours. How long would it take Tom, working alone, to do all of the yard work?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = number of hrs Tom takes to do it
Add their rates of working
( 1 yard ) / ( 6 hrs ) + ( 1 yard ) / ( t hrs ) = ( 1 yard ) / (4 hrs )

Multiply both sides by

It takes Tom 12 hrs working alone
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