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Q.

The age of Dr. Pandey is four times the age of his son. After 10 years , the age of Dr. Pandey will be twice the age of his son. The present age of Dr. Pandey's son is

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a

8  years

b

4 years

c

5 years

d

6  years

answer is B.

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Detailed Solution

Age of Son= x, Age of doctor= 4x

4x+10=2(x+10)4x−2x=20−102x=10x=5

Age of Son = 5 year

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