SOLUTION: Mark can finish a task alone in 24 days while Andres can do the same task in 18 days. If they work together, how long can they finish the task?

Question 979011: Mark can finish a task alone in 24 days while Andres can do the same task in 18 days. If they work together, how long can they finish the task?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

If A can do a job in x time periods, then A can do

of the job in 1 time period. Likewise, if B can do the same job in y time periods, then B can do

of the job in 1 time period.

So, working together, they can do

of the job in 1 time period.

Therefore, they can do the whole job in:

time periods.

John

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