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Posted Date: 09 Nov 2008      Posted By: sridevi      Member Level: Diamond       Category: Arithmetic Reasoning

Two pipes can fill a tank in 10 and 12 hours respectively while third pipe will make the tank empty in 20 hours. If all three pipes operate simultaneously, in how many hours the tank will be filled ?



Select Answer:

7 hr 30 min
4 hr 30 min
2hr 40 min
none




      
Your Test Score: 0 / 0



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