Question

5 years old anu was thrice the old of sonu.after 10 year anu will be twice the old of Sonu.how old are anu and Sonu​

Answer 1

Answer:

Step-by-step explanation:

Hello,

Anu is 5 years old, right?

I can see how this is hard.

Thrice means 3.

That means Sonu will be around 1 1/6 years old.

After that, Anu is now 15.

Sonu is supposed to now be 7.5.

Does this help?

Answer 2

5 years ago :-

Anu's age  is 3(x-5).

10 years later :-

Anu's age  is 2x.

Present ages :-

Sonu is x years old and Anu is y years old.

Now let us form equations from the given data.

$2x-10=y$

⇒ $2x-y=10$ --------------- 1

The first equation relates Anu's present with her future age.

$3(x-5)+5=y$

⇒ $3x-10=y$ ------------------ 2

⇒ $3x-y=10$ ------------------ 3

The third equation relates Anu's past age with her past age.

Solution of given system of equation :-

Subtracting equation (1) from equation (2), we get,

x - 3y - (x - 2y) = 10 - (-10)

x - x - 3y + 2y = 10 + 10

y = 20

On putting the value of y = 20 in equation (1) we get

x − 3 × 20 = −10

x = 60 – 10

x = 50

∴ Age of Anu =50 years and age of Sonu = 20 years respectively.