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Q: Ten years ago, A was half of B in age. If the ratio of their present ages is 3:4, then what will be the total of their present ages?

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Answer :
Explanation :

Let A's age 10 years ago be x years . Then B's age 10 years ago be 2x years  Total of their present ages = x + 10 + 2x + 10 = 3x+20 = 3 * 5 + 20 = 35 years

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