Question

Monu 's father is four times as old as Rakhi.After 5 years her mother will be three times as old as she will be then . Find their present ages.​

Answer 1

Correct Question :

Monu 's father is four times as old as Monu. After 5 years his father will be three times as old as he will be then . Find their present ages.

Solution :

Given :

• Monu 's father is four times as old as Monu.

• After 5 years her mother will be three times as old as she will be then .

To find :

• Their present ages =?

Step-by-step explanation :

Let the present age of Monu's be x.

Then, the present age of Monu's father be 4x.

After 5 years Monu's age = x + 5

After 5 years Monu's father age = 4x + 5

According to the question :

4x + 5 = 3(x + 5)

4x + 5 = 3x + 15

4x - 3x = 15 - 5

x = 10

Therefore, We got the value of, x = 10.

Hence,

Monu's present age, x = 10 years.

Then, Monu's father present age, 4x = 4 × 10 = 40 years

Answer 2

Correct question :-

Monu's father is four times as old as Monu. After 5 years his father will be three times as old as he will be then . Find their present ages.

To find :-

• The present age of Monu and his father = ?

Given :-

• Monu 's age is 4 times as old as Monu
• After 5 years her mother will be 3 times as old as she

Solution :-

Let the present age of Monu be :- x

Thus his father's present age will be :- 4x

After 5 years,

Age of Monu will be :- 5 + x

Age of Monu's father will be :- 4x + 5

According to question,

4x + 5 = 3(x + 5)

➡ 4x + 5 = 3x + 15

➡ 4x - 3x = 15 - 5

➡ x = 10

Therefore , the present age of Monu is 10 years and that of his father is 40 ( 4x = 4 × 10 = 40 ) years .