Question

p takes 4 days to complete 1/3rd of a job r takes 3 days to complete 1/6th of the same work and a takes 5 days to complete half the job.if all of them work together for 3 days and p and a quit how long will it take for r to complete the remaining work done.

Answer 1

P will complete whole work in 12 days

R will complete in 18 days

A in 10 days

1 day work of P R A = 1/12 + 1/18 + 1/10 = 1/180

they worked for 3 days together, so 3 days work = 3/180 = 1/60

So 1/60 work is complete and remaining is 59/60

that has to be completed by R So 59*18 / 60

= 17.7 days