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ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
40 years
A person's present age is two-fifth of the age of his mother. After 8 years , he will be one-half of the age of his mother . How old is the mother at present ?Let, present age of mother = xpresent age of the person or son = 2x/5After 8 year, mother's age = x+8son's age = 2x/5 + 8As per question,2x/5 + 8 = (x+8)/2or, (x+8)/2 - 2x/5 = 8or, x=40 So, present age of mother = 40 years (Ans:)