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Seema's present age is four times her son's present age and four-seventh of her father’s present age. The average of the present age of all three of them is 32 years. What is the difference between the Seema’s son's present age and Seema's father's present age?
44 years
48 years
46 years
Cannot be determined
Let Seema’s son’s present age = x years ∴ Seema’s present age. = 4x years ∴ Seema’s father’s present age = 4x × 7/4 = 7x years Now x + 4x + 7x = 32 × 3 = 12x = 96 x = 96/12 = 8 ∴ Required difference = 7x – x = 6x = 6 × 8 = 48 years
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