A and B together completed the work in 10 days
B alone can do the same work in 15 days [0.5 Mark]
A and B 's one day's work =110
and B 's one day's work =115 [0.5 Mark]
∴ A's one day's work =110−115
=3−230=130[0.5Mark]
Hence A can do the same work in =30 days
[0.5 Mark]