X can do a piece of work in 24 days. When he had worked for 4 days, Y joined him. If complete work was finished in 16 days, Y can alone finish that work in `18\ d a y s` b. `27\ d a y s` c. `42\ d a y s` d. `36\ d a y s`

A can do a work in 12 days. When he had worked for 3 days, B joined him. If they complete the work in 3 more days, in how many days can B alone finish the work?

A and B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days shall B finish the whole work alone ? a. 30 d a y s b. 40 d a y s c. 60 d a y s d. 70 d a y s

A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work ? 18 d a y s b. 24 d a y s c. 30 d a y s d. 36 d a y s

X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days. How long will they together take to complete the work ? 13 1/3 d a y s b. 15 d a y s c. 20 d a y s d. 56 d a y s

X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last? 6 d a y s b. 10 d a y s c. 1 5 d a y s d. 20 d a y s

A man and a boy can do a piece of work in 24 days. If the man works alone for the last 6 days, it is completed in 26 days. How long would the boy take to do it alone? a. 20 days b. 24 d a y s c. 36 d a y s d. 72 d a y s