The cost of a chocolate is $Rs. (x+y)$ and Rohit bought $(x+y)$ choclates . Find the total amount paid by him in terms of x. If $x=10$, find the amount paid by him

Question

$\begin{array}{1 1} (2x+3y)^2 \\ 2x+3y \\12 xy \\ (x+y)^2 \end{array} $