What is Age of B Today? If

The ratio of ages of A and B 10 years ago was 3 : 5. If the ratio of their present ages is 2:3, how old is B today?

  1. 40 years
  2. 30 years
  3. 60 years
  4. 24 years
Monis Rasool Professor Asked on 23rd May 2015 in Maths.
Add Comment
1 Answer(s)

Answer: (c) 60 years
Explanation:-

Let the age of A = X years and the age of B = Y years

According to question, (X – 10)/(Y – 10) = 3/5
5X – 50 = 3Y – 30
5X – 3Y = 20           …………………….(1)

Again, X/Y = 2/3
3X = 2Y
3X – 2Y = 0            ……………………….(2)

Solve equation (1) and (2)
X = 40 and put the value of X In equation (1)
5 x 40 – 3Y = 20
– 3Y = 20 – 200
3Y = 180
Y = 60

Anurag Mishra Professor Answered on 24th May 2015.
Add Comment

Your Answer

By posting your answer, you agree to the privacy policy and terms of service.