Question

The ratio of age of rahul & vimal 4 yeras ago is 4:3.the ratio of sum & difference of their present age is 9:1.what will be the age of vimal after 4 years

Answer 1

Answer:

20 year

Step-by-step explanation:

As the ratio is 4:3, let the age of rahul & vimal, that time, be 4a and 3a.

So, present age of:

Rahul = 4a + 4

Vimal = 3a + 4

In question,

= > (sum of their ages):(difference in their ages) = 9:1

= > (4a + 4 + 3a + 4):{4a+4-(3a+4)} = 9:1

= > (7a + 8):(4a + 4 - 3a - 4) = 9:1

= > (7a + 8): a = 9:1

= > 7a + 8 = 9a

= > 8 = 9a - 7a

= > 8 = 2a

= > 4 = a

Present age of vimal = 3a + 4 = 3(4) + 4 = 16 year

So, after 4 years, age of vimal = 16+4 = 20 year