The sum of the present ages of two persons A and B is 60. If the age of A is twice that of B, find the sum of their ages 5 years.

60 years
65 years
70 years
75 years

Correct Answer: 70 years

Explanation:

Take A's age as a, B's age as b. a + b = 60 a = 2b So, b + 2b = 60 3b = 60 b = 20 a = 40 So A is 40, B is 20. In 5 years' time, A will be 45, B will be 25. so the sum of their ages will be 70

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