SOLUTION: A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B dad to leave and A alone completed the remaining work. The

Question 770917: A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B dad to leave and A alone completed the remaining work. The whole work was completed in_____.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
A's rate of working:
( 1 job ) / ( 15 days )
B's rate of working:
{ 1 job ) / ( 10 days )
-----------------
What fraction of the job did they get
done in 2 days? Let the fraction =

Multiply both sides by

That means there is 2/3 of the job left to finish
---------------
A working alone:
Let = time in days to finish job

days
---------------
The whole work was completed in days

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