Mr. Rahim who is 28 years of age has a son who is 4 years old. In how many years will Mr. Rahim be 4 times as old as his son?

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উত্তর: 4

Let, after x years Mr. Rahman will be 4 times as old as his son. So, 4(4 + x) = 28 + x or, 16 + 4x = 28 + X or, 4x - x = 28 - 16 or, 3x = 12 or, x = 4 Therefore, after 4 years Mr. Rahman will be 4 times as old as his son and that is answer option (d).

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Mr. Rahim who is 28 years of age has a son who is 4 years old. In how many years will Mr. Rahim be 4 times as old as his son?

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