SOLUTION: A father and his son can do a job in 20 days. The father can do four times as much work as his son in a given amount of time. In how many days can the father do the job alone?

SOLUTION: A father and his son can do a job in 20 days. The father can do four times as much work as his son in a given amount of time. In how many days can the father do the job alone?

Algebra.Com

Question 901871: A father and his son can do a job in 20 days. The father can do four times as much work as his son in a given amount of time. In how many days can the father do the job alone?

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/x+1/(4x)=1/20
4/4x+1/(4x)=1/20
5/4x=1/20
4x=100
x=25 days for the father alone
check
1/25+1/100=1/20
4/100+1/100=5/100
5/100=5/100
ok

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