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Question
The ages of A and B are in the ratio 6 : 5. If A’s age is 18 years, find the age of B.
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Solution
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 = `(18xx5)/6=15`
∴ B's age = 15 years.
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