What will be the Ratio of Present Age?If

The age of a father 10 years ago was thrice the age of his son. Ten years later father’s age will be twice that of his son. The ratio of their present age is:

  1. 8:5
  2. 7:3
  3. 5:2
  4. 9:5
Monis Rasool Professor Asked on 21st June 2015 in Reasoning Questions.
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1 Answer(s)

Answer: (2) 7 : 3
Explanation:-
Let be the age of the father is X years  and age of the son is Y years.
10 years ago ,
X – 10 = 3( Y – 10)
X – 10 = 3Y – 30
X – 3Y = -20                 ……………………..(1)
10 years later,
X + 10 = 2(Y + 10)
X – 2Y = 10   . ……………………………………..(2)
Solve equation (1)   &    (2)
X = 70 years   and              Y = 30 years
The ratio of present age is 7 : 3
Hence, the answer is (2) 7 : 3

Anurag Mishra Professor Answered on 21st June 2015.
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