The ratio of the present age of a father to the present age of his son is 7 : 2. The product of their present ages in years is 350. 4 years ago from present, what was the ratio of ages of father and son respectively?
Show answer & explanation
Correct answer: B
Explanation
Agreed
Father's age = 7x
Son's age = 2x
Product of their present ages:
Present age of father: 7 × 5 = 35 years
Present age of son: 2 × 5 = 10 years
Father's age (4 years ago): 35 - 4 = 31 years
Son's age (4 years ago): 10 - 4 = 6 years
Ratio of age of father and son 4 years ago = 31: 6