Question

Rina is 4 years younger than her elder sister. After 6 years the sum of their ages will be 48 years. Findi Rina's present age. ​

Answer 1

Answer:

Let the present age of Ritu and Reena will be x and y respectively.

four years ago,

y−4

x−4

=

6

5

6x−24=5y−20

6x−5y=4...............(i)

After eight years,

y+8

x+8

=

9

8

9x−8y=−8 ................(ii)

from equation (i) and (ii)

we get x=24 and y=28

So, sum of their ages at present =(24+28)

=52 years.

Answer 2

Answer:

Rina's present age is 16 years

Step-by-step explanation:

Let Rina's present age be x and that of her elder sister be y

According to 1st condition,

y - x = 4

According to 2nd condition,

(y+6) + (x+6) = 48

y + x + 12 = 48

y + x = 36

Adding both the equations

2y = 40

y = 20

Putting the value of y in equation 1

x = 16