Question

At present, Ami’s age is twice Dio’s age and Cami is two years older than Ami. Two years ago, the respective ratio between Rio’s age at that time and Cami’s age at that time was 4 : 9. What will be Ami’s age four years hence ?
(1) 40 years
(2) 30 years
(3) 42 years
(4) 36 years
(5) 48 years

Answer 1

Let us assume Dio and Rio are same

At present let's assume
Ami's age = x
Rio's age = x/2
Cami's age = x+2

2 years ago
Rio/Cami = 4/9
i.e. x-4/2x = 4/9 => x = 36

after 4 years Ami will be x + 4 = 36+4 = 40 years