Question

51. The present age of a man is 4 times to that of his son. After 20 yr, his age will be twice to age of his son, then present age of his son is.
12 yr
20 yr
10 yr
14 yr​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Let the age of son be x and the age of father be y.

Since, the age of father is 4 times to his son.

So,

y=4x ……. (1)

Since, the age of father is 2 times to his son after 16 years.

So,

y+16=2(x+16)

y+16=2x+32

y=2x+16 ……. (2)

From equation (1) and (2), we get

4x=2x+16

2x=16

x=8

And y=32

Hence, the age of son is 8 years and age of father is 32 years.