WBCS.LIVE practice question

If x: y = 2: 1, then ({\mathrm{x}}^2 - {\mathrm{y}}^2): ({\mathrm{x}}^2 + {\mathrm{y}}^2) =?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 3:5
  2. 5:3
  3. 1:3
  4. 3:1

Correct answer and explanation

Correct answer: 3:5

Explanation: āœ… Correct Answer: A) 3:5 šŸ“š Explanation: Since x:y is 2:1, we can substitute x = 2 and y = 1 directly into the expression. This gives us (2^2 - 1^2) in the first part and (2^2 + 1^2) in the second. The calculation (4 - 1) gives 3, and (4 + 1) gives 5. Therefore, the ratio of the resulting values is 3:5.