Alice can complete a project in 20 days and Bob can complete the same project in 30 days. Alice and Bob start working on the project together, with Alice quitting after some time, and it takes Bob another 10 days to complete the project. What is the total number of days it took to complete the project?

Question

amistre64 · Answer

what are the uit rates for each person?

anonymous · Answer

Alice = $$\frac{ 1 }{ 20 }$$
Bob = $$\frac{ 1 }{ 30 }$$
???

amistre64 · Answer

good,  lets go ahead and figure out bobs 10 days of working

amistre64 · Answer

are yo not interested in the results?