SOLUTION: One technician can wire a security alarm in 12 h, whereas it takes 10 h for a second technician to do the same job. After working alone for 6 h, the first technician quits. How lon

Algebra ->  Rate-of-work-word-problems -> SOLUTION: One technician can wire a security alarm in 12 h, whereas it takes 10 h for a second technician to do the same job. After working alone for 6 h, the first technician quits. How lon      Log On


   

Question 1124968: One technician can wire a security alarm in 12 h, whereas it takes 10 h for a second technician to do the same job. After working alone for 6 h, the first technician quits. How long will it take the second technician to complete the wiring?
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


The first technician can do the job in 12 hours; but he works for 6 hours and then quits. What fraction of the job did he complete?

Then what fraction of the job is left for the second technician?

If the second technician can do the whole job in 10 hours, how long will it take him to do that remaining fraction of the job?