12 men complete a work in 9 days. After they have worked for 6 days, 6 more men join them. How many days will they take to complete the remaining work? `2\ d a y s` b. `\ 3\ d a y s` c. `4\ d a y s` d. `5d a y s` e. none of these

45 men can complete a work in 16 days.Six days after they started working,30 more men joined them.How many days will they now take to complete the remaining work?

12 men complete a work in 18 days. Six days after they had started working, 4 men joined them. How many days will all of them take to complete the remaining work ?

8 men can complete a piece of work in 20 days. 8 women can complete the same work in 32 days. In how many days will 5 men and 8 women together complete the same work? 10 d a y s b. 12 d a y s c. 14 d a y s d. 16 d a y s e. none of these