Joe's age, Joe's sister's age and Joe’s fathers age sums up to 100. When Joe is as old as his father, Joe's sister will be twice as old as now. When Joe is as old as his father then his father is twice as old as when his sister was as old as her father. Find the age of Joe's father?
","rationale_html":"Joe+Sister+Father=100
After x years joe age is equal to his father
Joe+x = father
Therefore, Sister+x = 2 * Sister
=> Sister=x
Joe+Sister=Father
Therefore,
=> 2*Father = 100
=> Father= 50
Hence (C) is the correct answer
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","ord":1},{"label":"C","content_html":"50
","ord":2},{"label":"D","content_html":"55
","ord":3},{"label":"E","content_html":"58
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