Question
Saurabh can complete a piece of work in 20 days. He
worked for 5 days and left. Anirudh completed the remaining work in 12 days. If both of them had done the work together, the work would have been completed in how many days?Solution
Saurabh can complete a piece of work in 20 days=1 Saurabh can complete a piece of work in 1 days=1/20 After 5 days =5/20=¼ remaining work=1-¼=¾ ATQ- Anirudh ¾ =12days Anirudh can do a work =16 days so now Saurabh       Anirudh 20                16          80 4                  5 Saurabh and Anirudh had done work complete=80/5+4 =80/9 = 889days Â
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