A can do a piece of work in 14 days whereas B can do the same in 13 days. If the ratio of work done by A in 7 days to that of B in 7 days is k : 1, then k =?
Work done by A in one day = 114
Work done by B in one day = 113
Work done by A in 7 days = 714
Work done by B in 7 days = 713
Ratio = 1314