Question

Pujas father age is trice as old as puja. After 15 years he will be just twice his daughter. Find there present age

Answer 1

HEY YOUR ANSWER IS .....


Let present age of Puja = x years

Let present age of her father = y years

So ,

3x = y

So ,

3x - y = 0 ___(1)

After 15 years ,

Age of Puja = x + 15 years

Age of her father = y + 15 years

So ,
2(x+15)=y+15

So,
2x+30=y+15

So ,
2x-y=15-30

So ,
2x-y=-15___(2)

From ___(1) we get ,

x=y/3 ___(3)

Substitute the value of x in Equation (2) we get ,

2(y/3)-y=-15

So ,
2y/3-y=-15

So ,
2y-3y/3=-15

So ,
-y/3=-15

So ,
-y = -45

So ,
y=45

Now substitute the value of y in equation (3) we get ,

x=45/3

So ,
x=15

So ,

Present age of Puja = 15 years and
Present age of her father = 45 years .




Hope it helps .....

Answer 2

Thanks for the asking questions
in this case we need to be let

present age of Puja = x years

and present age of her father = y years

then,3x = y

3x - y = 0 ,,,,,,, (2)

After 15 year of Puja age = x + 15 years

Age of her father = y + 15 years

now

2(x+15)=y+15

2x-y=15-30

2x-y=-15,,,,,,,,,,,, (2)

in equation (1) we get ,

x=y/3 ,,,,,,,,(3)


now

Substitute the value of x in Equation (2) we get ,

2(y/3)-y=-15

2y-3y/3=-15

-y/3=-15

y=45

Now substitute the value of y in equation (3) we get ,

x=45/3

x=15

Then

Present age of Puja = 15
Present age of her father = 45