SOLUTION: A boy can do a piece of work in 15 days & his father ca do it in 10 days. How long will it take them to do the work together?

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 Click here to see ALL problems on Miscellaneous Word Problems Question 97183: A boy can do a piece of work in 15 days & his father ca do it in 10 days. How long will it take them to do the work together?Answer by ankor@dixie-net.com(15624)   (Show Source): You can put this solution on YOUR website!A boy can do a piece of work in 15 days & his father ca do it in 10 days. How long will it take them to do the work together? : Let x = time required to complete the job together : Let the completed job = 1 : + = 1 : multiply equation by 30, to get rid of the denominator 30* + 30* = 30(1) : Cancel out the denominators and you have: 2x + 3x = 30 5x = 30 x = 30/5 x = 6 hrs working together : : Check solution. Substitute 6 for x: + = 1 + = 1