Explanation
To find the weight of one book, follow these steps:
1. Calculate the weight of one book:
\[
\text{Weight of one book} = \frac{\text{Total weight}}{\text{Number of books}}
\]
Given:
- Total weight = 4 kg
- Number of books = 16
\[
\text{Weight of one book} = \frac{4 \text{ kg}}{16} = 0.25 \text{ kg}
\]
2. Convert kg to grams (since 1 kg = 1000 g):
\[
0.25 \text{ kg} = 0.25 \times 1000 \text{ g} = 250 \text{ g}
\]
None of the provided options (20 g, 25 g, 55 g, 40 g) match 250 g. Therefore:
E. None of the above