Question
The ratio of A and B present age is 7:4. The product of
their ages is 2800. What will be the ratio of their ages after 5 years?Solution
Let their present age be 7x and 4x respectively. Product of their ages = 28x² = 2800 => x² = 100 => x = 10 Present age of A = 7x = 70 years Present age of B = 4x = 40 years Ratio of their ages after 5 years = (70+5) : (40+5) = 75:45 = 5:3
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