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Kiran's uncle is 4 times as old as Kiran. After 20 years, the uncle will be twice as old as Kiran. Find Kiran's present age (in years).

Competition practiceAverages & Ages

A10
B12
C8
D15

Step-by-Step Solution

Let Kiran be

x

. Then

4 x + 20 = 2 (x + 20)

, so

2 x = 20

and

x = 10

(uncle 40; in 20 years

60 = 2 \times 30

).

Answer: A) 10

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