CAT 2017 Slot 2 QA Q8 Time & Work

Question 8 of the Quantitative Ability (QA) section, CAT 2017 Slot 2, with CAT's official answer.

A tank has an inlet pipe and an outlet pipe. If the outlet pipe is closed then the inlet pipe fills the empty tank in 8 hours. If the outlet pipe is open then the inlet pipe fills the empty tank in 10 hours. If only the outlet pipe is open then in how many hours the full tank becomes half-full?
  1. A
    20
  2. B
    30
  3. C
    40
  4. D
    45

Answer: (A) 20 Time & Work MCQ

A worked solution for this question is being written. Meanwhile, practise it in a timed mock and see how other aspirants did.

Same concept in other years

See every question on Pipes and cisterns with a draining pipe: net rate = fill − drain.

More Time & Work questions from CAT

All 34 Time & Work questions asked since 2017.