SOLUTION: it takes Mark five hours to paint a fence. Abharsa can paint the same fence in nine hours. if they worked together how long would it take them to paint the same fence?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: it takes Mark five hours to paint a fence. Abharsa can paint the same fence in nine hours. if they worked together how long would it take them to paint the same fence?      Log On


   

Question 940473: it takes Mark five hours to paint a fence. Abharsa can paint the same fence in nine hours. if they worked together how long would it take them to paint the same fence?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
Mark paints 1%2F5 fence per hour.
Abharsa paints 1%2F9 fence per hour.
Together they paint 1%2F5%2B1%2F9=9%2F45%2B5%2F45=14%2F45per hour.
It would take them 1%2F%2814%2F45%29=3.2 hours to paint the fence.