A tank can be filled by a pipe P in 32 minutes and by pipe Q in 36 minutes. When it is full, it can be emptied by a pipe R in 20 minutes. If all the three pipes are opened simultaneously, half of the tank will be filled in ________.

A tank can be filled by a pipe P in 32 minutes and by pipe Q in 36 min

1.	A tank can be filled by a pipe P in 32 minutes and by pipe Q in 36 minutes. When it is full, it can be emptied by a pipe R in 20 minutes. If all the three pipes are opened simultaneously, half of the tank will be filled in ________.
A.	\(55\frac{3}{5}\;minutes\)
B.	\(55\frac{13}{3}\;minutes\)
C.	\(55\frac{5}{13}\;minutes\)
D.	\(55\frac{2}{5}\;minutes\)
Answer» D. \(55\frac{2}{5}\;minutes\)

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A tank can be filled by a pipe P in 32 minutes and by pipe Q in 36 minutes. When it is full, it can be emptied by a pipe R in 20 minutes. If all the three pipes are opened simultaneously, half of the tank will be filled in ________.

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