Question
The present ages of 'A' and 'B' are in the ratio of
3:7. The difference between their current ages is 12 years. How much percent older will 'B' be than 'A' three years from now?Solution
Let the present ages of 'A' and 'B' be '3x' years and '7x' years, respectively. So, 7x - 3x = 12 Or, 4x = 12 So, x = 3 So, present age of 'A' = 3 X 3 = 9 years And present age of 'B' = 7 X 3 = 21 years So, three years hence from now, ages of 'A' and 'B' will be 12 years and 24 years, respectively. So, required percentage = {(24 - 12)/12} X 100 = 100%
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