Question

6 man 8 boy any work does in 18 day . how many days work 9 man or 6 boy​

Answer 1

Answer:

25 days I am not sure

but I thought it is right

Answer 2

Answer:

Answer is 11.142 Days

Explanation:

8 men can complete a work in 39days

so, 1 men completes in (39*8) days. also 1 man can do 1/(39*8) part of work per day. hence 4 men can do 4/(39*8) part of work per day

6 boys can do the same work in 39 days

so, 1 boy completes in (39*6) days, also 1 boy can do 1/(39*6) part of work per day. hence 18 boys can do 18/(39*6) part of work per day

so, 4 men and 18 boys can do {[4/(39*8)]+[18/(39*6)]} part of work in a day.

4/(39*8) = 1/78

18/(39*6) = 1/13

[4/(39*8)]+[18/(39*6)] = (1/78)+(1/13) = 91/1014

so, 4 men and 18 boys complete 91/1014 part of work in a day. Hence they will take 1014/91 days to complete. That is nothing but 11.142Days.