Present age of Vinod and Ashok are in ratio of 3:4 respectively. After 5 years, the ratio of their ages becomes 7:9 respectively. What is Ashok’s present age is ?
(A) 40 years
(B) 28 years
(C) 32 years
(D) 36 years
Answer: (A)
Explanation: Let the present age of Vinod and Ashok be 3x years and 4x years respectively.
Then (3x+5) / (4x+5) = 7 / 9 ∴ 9(3x + 5) = 7(4x + 5) ∴ 27x + 45 = 28x + 35 ∴ x = 10 ∴ Ashok’s present age = 4x = 40 years