Two pipes A and B can fill a cistern in 12 minutes and 15 minutes respectively while a third pipe C can empty the full tank in 6 minutes. A and B kept open for 5 minutes in the beginning and then C was also opened. In what time is the cistern emptied?
A) 30min
B) 33min
C) 3712min
D) 45
min

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Pawan Prajapati · Answer

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Two pipes A and B can fill a cistern in 12 minutes and 15 minutes respectively while a third pipe C can empty the full tank in 6 minutes. A and B kept open for 5 minutes in the beginning and then C was also opened. In what time is the cistern emptied? A) 30min B) 33min C) 3712min D) 45 min

Two pipes A and B can fill a cistern in 12 minutes and 15 minutes respectively while a third pipe C can empty the full tank in 6 minutes. A and B kept open for 5 minutes in the beginning and then C was also opened. In what time is the cistern emptied?
A) 30min
B) 33min
C) 3712min
D) 45
min

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Two pipes A and B can fill a cistern in 12 minutes and 15 minutes respectively while a third pipe C can empty the full tank in 6 minutes. A and B kept open for 5 minutes in the beginning and then C was also opened. In what time is the cistern emptied? A) 30min B) 33min C) 3712min D) 45 min

Two pipes A and B can fill a cistern in 12 minutes and 15 minutes respectively while a third pipe C can empty the full tank in 6 minutes. A and B kept open for 5 minutes in the beginning and then C was also opened. In what time is the cistern emptied? A) 30min B) 33min C) 3712min D) 45 min

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Two pipes A and B can fill a cistern in 12 minutes and 15 minutes respectively while a third pipe C can empty the full tank in 6 minutes. A and B kept open for 5 minutes in the beginning and then C was also opened. In what time is the cistern emptied?
A) 30min
B) 33min
C) 3712min
D) 45
min