It takes Doug 6 days to reroof a house. If Doug's son helps him, the job can be completed in 4 days. How long would it take Doug's son, working alone, to do the job?
Answer (3)
rate of doug is 1 roof in 6 days. which means he could do 2/3 of a roof in 4 days, whixh means his son does 1/3 of a roof in 4 days, whhich is 1 roof per 12 days.
4 ( 6 1 + x 1 ) = 1 6 1 + x 1 = 4 1 x 1 = 12 1 x=12
Doug's son can complete the roofing job alone in 12 days. This is determined by finding their individual work rates and solving for the son's rate. After calculations, the son was found to complete the job at a rate of 12 1 jobs per day, leading to the conclusion that he would take 12 days to finish the job solo.
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