Question

12 men can do a work in 18 days. 4 days after they started the work 8 more men joined them.how many days will it take them now to complete the remaining work

Answer 1

Answer:

Step-by-step explanation:

12man can-do in one day=1/18part

4days they have done=4*1/18=2/9

Remaining work=1-2/9=7/9

One man can do=1/18*1/12=1/216

20man do=20/216=5/54

Remaining job completed in=7/9*54/5=42/5days