To find out how many chapters Raj can read in 64 minutes, we can use the following calculation:
- Determine how many chapters he can read in 64 minutes.
- Since he reads 1 chapter in 16 minutes, we can divide 64 minutes by 16 minutes per chapter:
\[ \text{Number of chapters} = \frac{64 \text{ minutes}}{16 \text{ minutes per chapter}} = 4 \]
So, Raj can read 4 chapters in 64 minutes.