Q 1 :    

A vector has magnitude same as that of $\overrightarrow{A}=3\hat{i}+4\hat{j}$ and is parallel to $\overrightarrow{B}=4\hat{i}+3\hat{j}$. The $x$ and $y$ components of this vector in first quadrant are $x$ and 3 respectively where $x=$ _________ .                    [2024]