CAT 2020 Slot 2 QA Q15 Time, Speed & Distance

Question 15 of the Quantitative Ability (QA) section, CAT 2020 Slot 2, with CAT's official answer.

The distance from B to C is thrice that from A to B. Two trains travel from A to C via B. The speed of train 2 is double that of train 1 while traveling from A to B and their speeds are interchanged while traveling from B to C. The ratio of the time taken by train 1 to that taken by train 2 in travelling from A to C is
  1. A
    7:5
  2. B
    4:1
  3. C
    1:4
  4. D
    5:7

Answer: (D) 5:7 Time, Speed & Distance MCQ

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