Math quiz 🔥🎯 #wbp #wbbsc #ssc

A pipe can fill a cistern in 12 min and another pipe can fill it in 15 min, but a third pipe can empty it in 6 min. The first two pipes are kept open for 5 minutes in the beginning and then the third pipe is also opened. Number of minutes taken to empty the cistern is

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Видео Math quiz 🔥🎯 #wbp #wbbsc #ssc канала Day With Brahma