Question

robert's father is 4 times as old as Robert after 5 yrs father will be three times as old as Robert. find their present ages

Answer 1

Answer:

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Step-by-step explanation:

Let Robert’s age be x years.

Then Robert’s father’s age = 4x

After 5 years, Robert’s age = x + 5

Father’s age = 4x + 5

According to the question,

4x + 5 = 3(x + 5)

⇒ 4x + 5 = 3x + 15

⇒ 4x - 3x = 15 - 5

⇒ x = 10

⇒ 4x = 4 × 10 = 40

Answer 2

Step-by-step explanation:

Let Robert's age is x.

then father's age is 4x as per the question

also, after 5 years

(4x+5)=3(x+5)    

4x+5=3x+15

4x-3x=15-5

x=10

    therefore x = 10 //

Answer:

Robert's age= 10 yrs

Robert's father's age= 4*10=40yrs    ///