CAT 2019 Slot 1 QA Q15 Time & Work

Question 15 of the Quantitative Ability (QA) section, CAT 2019 Slot 1, with CAT's official answer.

At their usual efficiency levels, A and B together finish a task in 12 days. If A had worked half as efficiently as she usually does, and B had worked thrice as efficiently as he usually does, the task would have been completed in 9 days. How many days would A take to finish the task if she works alone at her usual efficiency?
  1. A
    18
  2. B
    12
  3. C
    24
  4. D
    36

Answer: (A) 18 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

More Time & Work questions from CAT

All 34 Time & Work questions asked since 2017.