C-11-Q077mediumsingle_mcq
Sum of ages of father and son is years. years ago the ratio of their ages was . Father's present age is—
Sum of ages of father and son is years. years ago the ratio of their ages was . Father's present age is—
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ব্যাখ্যা
Let father , son with ; seven years ago gives . Substituting yields and , so the father is years old.