InterviewSolution
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From today, after five years the age of father will be three times of the age of the son, while five years ago father’s age was seven times of the age of his son. Then the present ages of father and son, in years are respectively:1. 31 and 72. 47 and 113. 40 and 104. None of these |
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Answer» Correct Answer - Option 3 : 40 and 10 Given: After five years the age of father will be three times of the age of the son. Five yearsago father’s age was seven times of the age of his son. Calculation: Let the age of son after 5 years be x. Then, the age of father after 5 years be 3x. The present age of son = x - 5 The present age of father = 3x - 5 The age of son 5 years ago = x - 5 - 5 = x - 10 The age of father5 years ago = 3x - 5-5 = 3x - 10 According to the question; ⇒ 7(x - 10) = 3x - 10 ⇒ 7x - 70 = 3x - 10 ⇒ 4x = 60 ⇒ x = 15 The present age of son = 15 - 5 = 10 years The present age of father = 3× 15 - 5 = 40 years ∴ Thepresent ages of father and son is 40 years and 10 years. |
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