Andy and Brad can finish a piece if work in 12 and 9 days respectively. They start off together and Andy leaves
on the third day. How many days more would Brad take to complete the work?

• Andy's 1 day work:1/12
  Brandy's 1 day work:1/9
  They together do in 1 day:(1/12+1/9)=7/36
  They together worked for 3 days; (7/36)*3=7/12
  Remaining work is only to be done by Brandy;1-7/12=5/12
  Brandy's 1 work is done in 9 days
  Brand's 5/12 is done in: 9*5/12=3.75days
• 13 years agoHelpfull: Yes(3) No(0)