Let's denote Rajesh's present age as R and Garima's present age as G.
Given, when Rajesh's age was G, the ratio of their ages was 3:2. So, we can write:
\(\frac{R - G}{G} = \frac{3}{2}\)
We need to find the ratio when Garima's age becomes R. So, the ratio will be: \(\frac{R}{G + (R - G)} = \frac{R}{R} = 1\)
Therefore, the ratio of their ages will be 1:5.