Question

15 men can complete a work in 12 days they start work together. In how many days the total work will be finished when
(1) After 4 days 5 more men join the work.
(2) After 4 days 5 men left the work.​

Answer 1

Answer:

15 men can do the work in 12days.

After 4 days remains work of 8days.

If 15 men can do that in (12-4) 8 days

Then 1 man can do in 15x8= 120 days. After 4days 5 more men joins the work

So total (15+5) 20 men can do the rest work (120÷20)= 6 days. Ans.