R can do a piece of work in 10 days. After she has worked in 2 days, M came to help her & together, they finished it in 3 days. In how many days could M do the work alone?

Question

michele_laino · Answer

please, if W is the work to be done, what is the ratio of R:

michele_laino · Answer

namely what is ratio work W over days of R?

michele_laino · Answer

Hint: ratio of R is:
$$\frac{ W }{ 10 }$$
are you agree?

michele_laino · Answer

@kmeds16

anonymous · Answer

sorry for the late reply, i was on mobile a while ago and then i transfered to pc... yes, w/10 i agree. And the total work done by R is 3, so is it 3/10?? @michele_laino

michele_laino · Answer

now from your data work done by R, after 2 days, is:
$$\frac{ W }{ 10 }*2=...$$
please write your answer

michele_laino · Answer

@kmeds16

michele_laino · Answer

please try!

michele_laino · Answer

|dw:1417953446164:dw|
are you agree?