What will be the Present Age of A? If

The ratio of the ages of A and B at present is 3:1. Four years earlier the ratio was 4:1. The present age of A is.

  1. 40 years
  2. 32 years
  3. 36 years
  4. 48 years
Monis Rasool Professor Asked on 7th July 2015 in Maths.
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1 Answer(s)

Answer: (3) 36 years
Explanation:-
Let be the present age of A is 3X years   and age of B is X years.
According to the question,
(3X – 4)/(X – 4 ) = 4/1
by cross multiplication,
3X – 4 = 4X – 16
X = 16 – 4
X = 12
Thus, the age of A is 3X = 3 x 12 = 36 years    and   the age of B is 12 years.
Hence, the answer is (3) 36 years.

Anurag Mishra Professor Answered on 8th July 2015.
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