**The ages of A and B are in the ratio 6 : 5. If A’s age is 18 years, find the age of B.**

###### Answers:

Ratio in the ages of A and B = 6 : 5

A’s age = 18 years

Let B’s age = x years

6 : 5 = 18 : x

⇒ 6/5 = 18/x ⇒ 6 × x = 18 × 5

⇒ x = (18 × 5)/6 = 15

∴ B’s age = 15 years.