Question

The ratio between the present age of P and Q is 3:4 respectively.if Q's present age is 20 years. What will be the ratio of the ages after 5 years?

Answer 1

Let the present age of P be x
3:4::x:20
4x=60
x=60/4
x=15

After 5 years their ages will be
P = 15+5=20 years
Q= 20+5=25 years

Their ratio

20:25
4:5

Answer 2

Let common factor be x
Age of P=3x
Age of Q=4x
4x=20
Or x=5
So age of P=3*5=15
And age of Q=4*5=20
After 5yrs age of P=20 age of Q=25
Ratio=20:25=4:5