CAT 2019 Slot 2 QA Q3 Equations

Question 3 of the Quantitative Ability (QA) section, CAT 2019 Slot 2, with CAT's official answer.

Let a, b, x, y be real numbers such that a2 + b2 = 25 , x2 + y2 = 169 and ax + by = 65. If k = ay - bx, then
  1. A
    k = 0
  2. B
    k > \(\frac{5}{13}\)
  3. C
    k = \(\frac{5}{13}\)
  4. D
    0 < k ≤ \(\frac{5}{13}\)

Answer: (A) k = 0 Equations MCQ

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

More Equations questions from CAT

All 52 Equations questions asked since 2017.