Question

The present age of Surekha is 5 times the present age of her son. 4 years ago the sum of their ages was 28 yrs. Find their present ages.​

Answer 1

Answer:

x = 8.8889 gm

y =21.1111 gm

Step-by-step explanation:

Let weight of silver in air be x and that of gold

be y

Therefore, x + y = 30 ----> 1

Now in water,

Thus x - X/10 + y - y/19 = 28

=> (171x + 180y)/190 = 28

=> 171x + 180y = 5320 ---->2

Multiplying Eq. 1 by 180 we get

180x + 180y = 5400 ----> 3

Subtrating Eq.2 from Eq.3

9x = 80

=> x = 8.8889 gm

Therefore y = 30 - X

=> y = 30 - 8.8889 = 21.1111 gm