The ratio of the present ages of A and B is 1 : 3. After 10 years, the ratio of their ages will be 2 : 5. Find B's present age.
Answer & explanation
Correct answer: option 3
ATQ,
\(\frac{x + 10}{3x + 10 }\) = \(\frac{2}{5}\)
5x + 50 = 6x + 20
x = 30
Present age of B = 3 × 30 = 90 years