Sharon can type 35 pages in 20 minutes. At this rate how many pages can she type in 10 minutes ?

Question

$\begin{array}{1 1} (a)\;\text{70 pages} \\ (b)\; \text{17.5 pages} \\ (c)\; \text{60 pages} \\ (d)\; \text{18.5 pages} \end{array}$