πŸ“’ Too many exams? Don’t know which one suits you best? Book Your Free Expert πŸ‘‰ call Now!

  • google app store apple app store
  • βœ–

      Question

      The average age of A, B and C is 40 years, while the

      average age of B, A and D is 30 years. If the ratio of the age of C and D is 5:3, respectively, then find the age of D.
      A 40 years. Correct Answer Incorrect Answer
      B 42 years. Correct Answer Incorrect Answer
      C 45 years. Correct Answer Incorrect Answer
      D 47 years. Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Sum of ages of A, B and C = 40 Γ— 3 = 120 years Sum of ages of B, A and D = 30 Γ— 3 = 90 years So, C – D = 120 – 90 = 30 years Let the age of C and D be 5x and 3x years, respectively. 5x – 3x = 30 2x = 30 x = 15 So, age of D = 3x = 45 years.

      Practice Next
      ask-question