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Posted By: nemo       Member Level: Diamond       Posted Date: 25 Jul 2007       Category: Aptitude Test

A water tank is two-fifth full. Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?

Select Answer:

6 min. to empty
6 min. to fill
9 min. to empty
9 min. to fill
None of these



      
Your Test Score: 0 / 0



Next Question: Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is :
Previous Question: Two pipes A and B can fill a cistern in 37½ minutes and 45 mnutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the pipe B is turned off after :
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