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Uma's grandfather is 50 years older than Uma. Ten years from now he will be exactly 3 times her age. How old is Uma now (in years)?

Competition practiceAverages & Ages

A10
B20
C15
D25

Step-by-Step Solution

Let Uma be

x

. Then

x + 60 = 3 (x + 10)

, so

2 x = 30

and

x = 15

(grandfather 65; in 10 years

75 = 3 \times 25

).

Answer: C) 15

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