6. Two pipes can fill a tank in 10 hours and 12 hoursrespectively whil – InterviewSolution

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1.	6. Two pipes can fill a tank in 10 hours and 12 hoursrespectively while a third pipe empties the fulltank in 20 hours. If all the three pipes are openedsimultaneously, in how much time the tank willbe filled?(a) 7 hours(c) 7 hours 30 minutes (d) 8 hours 30 minutes(b) 8 hours
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