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 foreman is correct or not.

QUESTION POSTED AT 29/05/2020 - 01:00 AM

Answered by admin AT 29/05/2020 - 01:00 AM

shawn does 1 job in 6 hours

 turn that into a fraction 1/6

Ellie 1 in 4 so fraction is 1/4

1/6 + 1/4 = 5/12

12/5 = 2.4

 it will take them 2.4 hours

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