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Mr. Iyer is 30 years older than his son. In 5 years, Mr. Iyer's age will be three times his son's age. How old is the son now?

Competition practiceAverages & Ages

A15
B10
C12
D8

Step-by-Step Solution

Let the son be

s

. Then

s + 30 + 5 = 3 (s + 5)

, so

s + 35 = 3 s + 15

and

s = 10

. (Check:

45 = 3 \times 15.

)

Answer: B) 10

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