12 man complete a work in 18 days they start but after 6 days four more man join the work. How many days will take all the man to complete the 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 ?

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?