Question

ages of Raju and Ravi are in the ratio 3:4 .Four years from now the ratio of their ages will be 4:5 . Find their present ages​

Answer 1

Their present ages are 12 years and 16 years.

Explanation:

Given that,

Ages of Raju and Ravi are in the ratio 3:4 .Four years from now the ratio of their ages will be 4:5.

Let their present age is 3x and 4x.

Ages after four years from now will be:

`(3x+4)/(4x+4)=(4)/(5)\\\\5(3x+4)=4(4x+4)\\\\15x+20=16x+16\\\\20-16=16x-15x\\\\x=4`

So,

Raju's present age is 3(4) = 12 years

Ravi's present age is 4(4) = 16 years