Question 1188324: John takes 8 hours to paint his room. After working for one hour, he called a painter to help him. Working together, they finished the job in 3 more hours. How long would it take for the painter to finish the job if he had worked alone?
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52787)   (Show Source):
You can put this solution on YOUR website! .
John takes 8 hours to paint his room. After working for one hour, he called a painter
to help him. Working together, they finished the job in 3 more hours.
How long would it take for the painter to finish the job if he had worked alone?
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Notice that John worked, in all, 1 + 3 = 4 hours; hence, John made half of the entire lob.
The helper made the other half of the job working 3 hours.
Hence, this helper could make the entire job in 6 hours, working alone. ANSWER
Solved.
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On joint work problems, see the lessons
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- OVERVIEW of lessons on rate-of-work problems
in this site.
Answer by josgarithmetic(39617)  (Show Source):
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