A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

Question

cwrw238 · Answer

when working together
1/20  + 1/30 +1/60  = 1/x
where x = number of days to do the job

anonymous · Answer

still cant find the answer. :(

cwrw238 · Answer

its tricky this one
A works for 2 days  then 3 of them work for one and so on...

anonymous · Answer

appreciate the effort miss. thank you :D but i really have to answer this. -sniffs-

cwrw238 · Answer

so A  does 1/10 of job in 2 days then 

- ok - no problem

anonymous · Answer

yes.

cwrw238 · Answer

x = 10

so in 3 days 1/10 + 1/10 = 1/5 of job is done
all you have to do now is add up

anonymous · Answer

thanks miss. imma do that.

cwrw238 · Answer

yw