30.Father's age is 4 times the age of his son. Five years hence, fathe

1.	30.Father's age is 4 times the age of his son. Five years hence, father's age will be three times theage of his son. Find their present ages.[A] 10 years, 40 years[B] 20 years, 80 years[C] 15 years, 60 years[D] 12 years, 48 years
Answer» Let present age of son is x then present age of father = 4x Five years henceAge of son = x + 5Age of father = 4x + 5 As per given condition4x + 5 = 3(x + 5)4x + 5 = 3x + 154x - 3x = 15 - 5x = 10 Therefore,Present age of son = 10 yearsPresent age of father = 4*10 =40 years (A) is correct option

30.Father's age is 4 times the age of his son. Five years hence, father's age will be three times theage of his son. Find their present ages.[A] 10 years, 40 years[B] 20 years, 80 years[C] 15 years, 60 years[D] 12 years, 48 years

Answer»

Let present age of son is x then present age of father = 4x

Five years henceAge of son = x + 5Age of father = 4x + 5

As per given condition4x + 5 = 3(x + 5)4x + 5 = 3x + 154x - 3x = 15 - 5x = 10

Therefore,Present age of son = 10 yearsPresent age of father = 4*10 =40 years

(A) is correct option