Question

A man got a child when he was 30 years. At which
age his age will be 2 times that of his child :​

Answer 1

Solution :-

Given : A man got a child when he was 30 years.

To find : At which age his age will be 2 times that of his child.

Let the age of his child be x years.

Man's age = x + 30 years.

According to the question,

=> 2x = x + 30

=> 2x - x = 30

=> x = 30

Therefore, Man's age = x + 30 = 30 + 30 = 60 years.

Hence,

At the age of 60 years, his age will be 2 times that of his child.

Answer 2

Answer:

At the age of 60 years.

Step-by-step explanation:

Given Problem:

A man got a child when he was 30 years. At which  age his age will be 2 times that of his child.

Solution:

To Find:

At which age his age will be 2 times that of his child.

Given that,

A man got a child when he was 30 years.

Let the age of his child be "y" years.

Man's age = y + 30 years.

According to the question,

$\sf => 2y = y + 30\\\ => 2y - y = 30\\\ => y = 30\\\ =>y + 30 = 30 + 30 = 60$

Hence,

At the age of 60 years, his age will be 2 times that of his child.