Add and Subtract Unlike Fractions Practice Test

On a hike, Noah walked $\frac{3}{5}$ mile and then $\frac{1}{2}$ mile. Both distances are parts of the same 1-mile whole. He rewrote them as $\frac{3}{5}=\frac{6}{10}$ and $\frac{1}{2}=\frac{5}{10}$. Which statement about the size of the result is correct?

A class has a same-sized 1-hour study block. Students spend $\frac{3}{5}$ of the hour reading and $\frac{1}{2}$ of the hour writing. The fractions must refer to the same whole (1 hour). A student rewrites them as $\frac{3}{5}=\frac{6}{10}$ and $\frac{1}{2}=\frac{5}{10}$. What fraction of the hour is spent reading and writing altogether?