Math, asked by User9170, 11 months ago

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 are kept open for 5 minutes in the beginning and then c is also opened. In what time is the cistern emptied ?

Answers

Answered by mukesh777

0

cistern empty in 45 minutes

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