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1. Ten years ago, A was half of B in age. If the ratio of their present age is 3 : 4 What will be the total of their present ages?
- A. 20years
- B. 20years
- C. 20years
- D. 20years
Answer: Option D
Explanation:
Let their present ages be 3x and 4x, Then
2(3x-10) = 4x - 10
2x = 10
x = 5
Sum of their present ages = 7x = 35
2(3x-10) = 4x - 10
2x = 10
x = 5
Sum of their present ages = 7x = 35
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