AppleXL Common Recruitment Examination CRE

7: 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?

1.) 6 min. to empty 2.) 6 min. to fill 3.) 9 min. to empty 4. ) 9 min. to fill 5.) None of these?

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This quiz was created by tapnawk on 2009-10-02T22:44:51-07:00