Question

A father is 3 times as old as his son. In 10 years time he will be double
his son's. Find their percentages.
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Answer 1

Correct Question : -

A father is 3 times as old as his son. In 10 years time he will be double his son's. Find their present age.

Solution : -

Given,

• Father's age is 3 times as old as son.
• After 10 years the father's age will be double as the son's age.

Let the son's age be " x "

The father's age be " 3x "

The equation is

➬ 3x + 10 = 2 ( x + 10 )

➬ 3x + 10 = 2x + 20

➬ 3x - 2x = 20 - 10

➬ $\tt \boxed { \: x \: = \: 10 \: }$

Therefore : -

➬ The present age of son is 10.

➬ The present age of father is

➬ 3( 10 ) = 30

Answer 2

Answer:-

Here:-

The father's age is 3 times old than his son.

The son's age is 10 years.

So,

Let's keep that the age of the father is:- x

Hence:-

We have to double/add the age of the son 3 times.

⇒ 10+3=30

∴ The age of the father is = 30 years.

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