There are three pipes A,B,C . A can fill a tank in 15hours, B can fill a tank 20hours,c can empty a tank in 25 hours.a man can start a tap A at 3 o'clock B at 4 o'clock & C at 5o'clock.find at what time tank can full?

• 15:39:08 O'clock
• 12 years agoHelpfull: Yes(1) No(2)
• tank will be filled in 13hr and 23 min ... after 3'o clock.... finding time after 5 o clock then adding 2/15 and 1/20 respectively... thus ans is 13.23
• 12 years agoHelpfull: Yes(1) No(0)