In first 6 days, C will work just two days but A and B will work 6 days.
So total work done by them in 6 days will
= (6×112)+(6×115)+(2×125)=
Remaining work = part of the work.
So. (A and B) 1 day's work=
In 7th day. C will not help them. Only A and B will do the part of the work because
Now, part of the work is done by A and B in 1 day
part of the work is done by A and B in = day
Total work will be completed in = days
ans. The number of days required to complete the work is days