1.

e years ago, Nuri was thrice as old as Sonu. Ten years later, Nuri will be twice asold as Sonu. How old are Nuri and Sonu?

Answer»

let nuri' age =x and song age=y five years ago x=3(y) x-3y=0......... (1) and after ten year x=2(y) x-2y=0..........(2) from equal 1 and 2 by elimination

Let the age of nuri be x

and the age of sonu be yaccording to question,

Five years ago:

Nuri's age = X-5

Sonu's age = Y-5

so,by condition

== (X-5) = 3(Y-5)

== X=3Y-15 + 5

== X= 3Y- 10 ...(1)

Ten years after:

Nuri's age = X+10

Sonu's age = Y+10(X+10) = 2(Y+10)

X= 2Y+ 20 -10X = 2Y+10

From eqution(i) X= 3Y- 10

→3Y- 10 = 2Y+10

→3Y- 2Y = 20

→Y = 20

putting value of y in (equation 1

→ X= 3(20)- 10

→ X= 50

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