Question

Five years ago, Nuri was thrice as old as Sonu. Ten years later, Nuri will be twice as old as Sonu. How old is Nuri?

Answer 1

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Let the present age of Nuri = x

And, the present age of Sonu = y

According to the given information,

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

⇒

x - 3y = -10 ... (i)

⇒

(x + 10) = 2(y + 10)

⇒

x - 2y = 10 ... (ii)

Subtracting equation (i) from equation (ii), we get

y = 20 ... (iii)

Putting this value in equation (i), we get

x - 60 = -10

⇒

x = 50

Hence, age of Nuri = 50 years and age of Sonu = 20 years.

Answer 2

Answer:

Let the present age of Nuri = x

And, the present age of Sonu = y

According to the given information,

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

⇒

x - 3y = -10 ... (i)

⇒

(x + 10) = 2(y + 10)

⇒

x - 2y = 10 ... (ii)

Subtracting equation (i) from equation (ii), we get

y = 20 ... (iii)

Putting this value in equation (i), we get

x - 60 = -10

⇒

x = 50

Hence, age of Nuri = 50 years and age of Sonu = 20 years.