What will be the age of Jais and his father after 12 years from now?

Jais and his father has an age difference of 35 years now. After 5 years, the sum of their age is 125. What will be the age of Jais and his father after 12 years from now?

  1. 40 & 75
  2. 45 & 70
  3. 51 & 85
  4. 52 & 87
Anurag Mishra Professor Asked on 8th December 2015 in Reasoning Questions.
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1 Answer(s)

Answer: (4) 52 & 87

Explanation:-
Let the present age of Jais be X years  and the age of his father be Y years.

Jais and his father has an age difference of 35 years now. 
Then,   Y – X = 35   …………………. (1) 

After 5 years, the sum of their age is 125.
 (X + 5) + (Y + 5) = 125
X + Y + 10 = 125
X + Y = 125 – 10
X + Y = 115  ………………………… (2) 

Add equation (1) & (2), 
Y – X + X + Y = 35 + 115
2 Y = 150
Y = 150/2
Y = 75 years

Now, put the value of Y = 75 in equation (2),
Then, X + 75 = 115
X = 115 – 75
X = 40 years

So, the age of Jais after 12 years = 40 + 12 = 52 years  and the age of his father after 12 years = 75 + 12 = 87 years. 

Hence, the correct answer is option (4) 52, 87.

Anurag Mishra Professor Answered on 9th December 2015.
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