NIMCET 2021 — Reasoning PYQ

 2 yr ago, Rita's age = $x$ (let) and Radha's present age = $2x$.

According to the question, Difference between their ages $=2\text{ yr}$  

$\Rightarrow 2x-(x+2)=2$  

$\Rightarrow 2x-x-2=2$  

$\Rightarrow x=4$  

Hence, Radha's present age $=4\times 2=8\text{ yr}$