CAT 2018 Slot 1 QA Q28 Time & Work

Question 28 of the Quantitative Ability (QA) section, CAT 2018 Slot 1, with CAT's official answer.

Humans and robots can both perform a job but at different efficiencies. Fifteen humans and five robots working together take thirty days to finish the job, whereas five humans and fifteen robots working together take sixty days to finish it. How many days will fifteen humans working together (without any robot) take to finish it?
  1. A
    40
  2. B
    32
  3. C
    36
  4. D
    45

Answer: (B) 32 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 Two kinds of workers or pipes in two combinations: solve for unit rates.

More Time & Work questions from CAT

All 34 Time & Work questions asked since 2017.