An empty pipe can empty 1/4 of a cistern in 15 minutes. In 5 minutes, what part of the cistern will be emptied ?

 An empty pipe can empty 1/4 of a cistern in 15 minutes. In 5 minutes, what part of the cistern will be emptied ?

A). 1/3

B).  1/6

C). 1/9

D). 1/12

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