Rohit can distribute all morning newspaper in 32/9 hours but with the assistance of his brother, the newspaper were distributed in 32/15 hours. In how many hours, his brother alone can distribute all morning newspaper?

Rohit can distribute all morning newspaper in 32/9 hours but with the assistance of his brother, the newspaper were distributed in 32/15 hours. In how many hours, his brother alone can distribute all morning newspaper?
1). 16/3 hours
2). 10/3 hours
3). 43/10 hours
4). 57/10 hours

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