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  • An outlet pipe can empty a cistern in 30 min, then what part of the cistern will it empty in 1 min?
Question 1:
An outlet pipe can empty a cistern in 30 min, then what part of the cistern will it empty in 1 min?
A. 1/20
B. 1/15
C. 1/30
Feedback We know that, when a pipe empties a cistern in n min, then the part emptied by the pipe in 1 min = 1/n.
Here, n=30. The required part of the tank emptied in 1 min = 1/30 part
D. 1/18

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