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  9. Q93

RRB Technician (Grade I Signal + Grade III) 2018 · Question 93 of 213

Two pipes A and can fill an empty cistern in 18 and 27 hours, respectively. Pipe C can drain the entire cistern in 45 hours when no other pipe is in operation. Initially, when the cistern was empty Pipe A and Pipe C were turned on. After a few hours Pipe A was turned off and Pipe B was turned on instantly. In all, it took 55 hours to fill the cistern. For how many hours was Pipe B turned on?

best-effort

  1. A50
  2. B45Correct
  3. C27
  4. D30

Answer: B. 45

Official answer key verified. Detailed explanation coming soon.

Source: RRB ALP & Technicians 2018 CBT-1: 17 Aug 2018, Shift 1 (cracku.in solved paper) · reliable-secondary

← Q92View full paper (213 questions)Q94 →

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