A and B together can complete a job in 10 days time. B and C can do the same work in 7 days. C and A can do the same work in 9 days. If A, B and C work individually, in how many days will each take to complete the job?
40 men can complete a work in 150 days. After 10 days 30 members join them. In how many days the total work should be completed?