WBCS.LIVE practice question

The ratio of wages of two labours is 4 : 3. If the wages of the first be decreased by Rs. 9 and that of the second be increased by Rs. 9, the ratio of the wages will be reverse ratio as it was at first. Determine the wages of first labour.

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

Answer options

  1. Rs. 27
  2. Rs. 36
  3. Rs. 42
  4. Rs. 48

Correct answer and explanation

Correct answer: Rs. 36

Explanation: āœ… Correct Answer: B. Rs. 36 šŸ“š Explanation: Let the initial wages be 4x and 3x. According to the problem, (4x - 9) / (3x + 9) = 3 / 4, which leads to the equation 16x - 36 = 9x + 27. Solving this gives 7x = 63, so x = 9. Therefore, the wages of the first labour is 4 * 9, which equals exactly Rs. 36.