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Question 77Asked in RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)

A tap can fill a cistern in 27 hours, while another tap can empty the full cistern in 36

A tap can fill a cistern in 27 hours, while another tap can empty the full cistern in 36 hours. If the cistern is initially empty and both taps are opened together, find the time (in hours) required to fill one-fourth of the cistern.
  1. A27
  2. B81
  3. C108
  4. D54
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Correct answer: (A) 27

From RRB JE CBT-1 PYQ 19 Feb 2026, Shift 2 (12:45 PM)

This is question 77 of RRB JE CBT-1 PYQ 19 Feb 2026, Shift 2 (12:45 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.