CAT 2018 Slot 2 QA Q21 Time & Work

Question 21 of the Quantitative Ability (QA) section, CAT 2018 Slot 2, with CAT's official answer.

A tank is emptied everyday at a fixed time point. Immediately thereafter, either pump A or pump B or both start working until the tank is full. On Monday, A alone completed filling the tank at 8 pm. On Tuesday, B alone completed filling the tank at 6 pm. On Wednesday, A alone worked till 5 pm, and then B worked alone from 5 pm to 7 pm, to fill the tank. At what time was the tank filled on Thursday if both pumps were used simultaneously all along?
  1. A
    4 : 12 PM
  2. B
    4 : 24 PM
  3. C
    4 : 48 PM
  4. D
    4 : 36 PM

Answer: (B) 4 : 24 PM 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.

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