SOLUTION: oliver alone can finish a certain job in 6 days and karl alone can do the same in 4 days.if they work together,how lone it can take them to finish the job

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Question 912070: oliver alone can finish a certain job in 6 days and karl alone can do the same in 4 days.if they work together,how lone it can take them to finish the job
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
1/a+1/b=1/x
1/4+1/6=1/x
6/24+4/24=1/x
10/24=1/x
x=24/10
x=2.4 days working together
check
x/a+x/b=1
x/4+x/6=1
2.4/4+2.4/6=1
0.6+0.4=1
1.0=1
ok
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