SOLUTION: Shawn and Ellie are construction workers. Shawn can complete a concrete job in 4 hours, while Ellie can complete it in 6 hours. The foreman says that it will take them 5 hours to c

Question 828316: Shawn and Ellie are construction workers. Shawn can complete a concrete job in 4 hours, while Ellie can complete it in 6 hours. The foreman says that it will take them 5 hours to complete it if they work together. Explain each step in solving this equation and determine if the the Foreman is correct or not.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Shawn's rate is ( 1 job ) / ( 4 hrs )
Ellie's rate is ( 1 job ) / ( 6 hrs )
Let = time for them to do the job together

Multiply both sides by

hrs
The foreman is wrong

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