Posted by **Jordan** on Friday, February 15, 2013 at 4:20am.

The ratio John's age to Ryan's age is 3:1 now . 25 years later , the ratio will become 4:3 .How old is John now ?

- Maths -
**Steve**, Friday, February 15, 2013 at 5:00am
j:r = 3:1, so j=3r

(j+25)/(r+25) = 4/3

(3r+25)/(r+25) = 4/3

3(3r+25) = 4(r+25)

9r+75 = 4r+100

5r = 25

r = 5

so, John is 15

in 25 years, the two will be 40 and 30

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