Question 1
The ratio of Dhara's age to Jai's age is 1:3. After 4 years, the ratio will become 1:2. Find Dhara's present age.
Let Dhara = 1k, Jai = 3k
After 4 years: (1k+4)/(3k+4) = 1/2
Solving gives k = 8, so Dhara = 8
After 4 years: (1k+4)/(3k+4) = 1/2
Solving gives k = 8, so Dhara = 8