Ratio of present ages of A and B is 7:5, respectively. C who is 3 years older than A will become 36 years older after 12 years. Find the present age of B.
Let, present ages of A and B be ‘7x’ years and ‘5x’ years respectively. So, 7x + 3 = 36 – 12 7x = 21 x = 3 Present age of B = 5x = 15 years
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