$\large\frac{1}{10}$th of the total ducks are swimming in a pond and $\large\frac{1}{5}$th of the total ducks are moving on the grass surrounding the pond. If the count of ducks outside the pond and grass are $28$, what is the total number of ducks ?

Question

$\begin{array}{1 1} (a)\;40 \\ (b)\;30 \\(c)\;98 \\(d)\;60 \end{array} $