Question:
The present age of Vinod and Ashok are in the 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) 40 years
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
Trial and Error method
One more simple method to know the Answer As Age ratio after 5 is 7/9 so Ashok Current age +5 should be divisible by 9 So that is 40+5=45 other reaming choice Don’t Satisfy So option A) is the right answer.
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