Question

The ratio og the present age of two brothers is 1:2 and 5 years back the ratio was 1:3.What will be ratio of their age after 5 years

Answer 1

present age s are x and 2x
5 years back,ages are x-5 and 2x-5
(x-5)/(2x-5)=1/3
3(x-5)=2x-5
3x-15=2x-5
x=10
after 5 years
ages are x+5=10+5=15
and 2x+5=20+5=25