1.

How long will it take for two pipes A and B to fill an empty cistern if they worked alternately for an hour each ?_x005F_x000D_ A. Working alone, Pipe A can fill the cistern in 40 hoursB. Pipe B is one third as efficient as Pipe A

A. Only A is sufficient
B. Only B is sufficient
C. Both (A) and (B) are sufficient
D. None
Answer» D. None


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