Question

A and B person present age ratio is 4:5 . this person before 18 years age ratio is11:16 .those persons present together total additions age​

Answer 1

Answer:90 years

Step-by-step explanation:

Given that,

A/B=4/5

Or, 5A=4B..........(1)

Before 18 years,

(A-18):(B-18)=11:16

Or, 16(A-18)=11(B-18)

Or, 16A-288=11B-198

Or, 16A-11B=288-198

Or, 16A-11B=90.........(2)

Or, 16A-11(5/4)A=90...........Using equation 1

Or, (64A-55A)/4=90

Or, 9A=4×90

Or, A=40 years

Now, B=(5A)/4=(5×40)/4=50 years.

Present age of both persons (A+B)=40+50=90 years