Pipe A can fill an empty cistern in 6 hours and pipe B can fill the same empty cistern in 8 hours. Both the pipes are opened simultaneously but after two hours, pipe A is closed. How many hours will B take to fill the remaining part of the cistern?
1
2
2
\(3\frac{1}{3}\)
3
\(3\frac{2}{3}\)
4
4