SOLUTION: jo can do a pice of work in 20days while paul can do it in 25days. they work for 5 days,then his brother backed out. how many days did jo work alone?

Question 580860: jo can do a pice of work in 20days while paul can do it in 25days. they work for 5 days,then his brother backed out. how many days did jo work alone?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Jo can do a piece of work in 20 days while Paul can do it in 25 days.
they work for 5 days, then his brother backed out.
how many days did Jo work alone?
:
Let t = time worked alone by Jo
:
Let the completed job = 1
:
+ = 1
Multiply by 100 to clear the denominators, results:
5(t+5) + 4(5) = 100
5t + 25 + 20 = 100
5t = 100 - 45
5t = 55
t = 55/5
t = 11 days Jo worked alone
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