Question:
The ratio between the ages of Appu and Ryan at present is 3 : 4. Five years ago the ratio of their ages was 2:3. What is the present age of Appu ?
A15 years
B20 years
C12 years
D30 years
Answer:
A. 15 years
Explanation:
The age of appu = A The age of rayan =R A/B=3x/4x ie A=3x & B=4x 5 years before the ratio of ages is (A-5)/(b-5)=2/3 want to find x (3x-5)/(4x-5)=2/3 (3x-5)x3=(4x-5)x2 9x-15=8x-10 x=5 then age of appu =A=3x=3x5=15