How many cups in 25 pounds bread flour?

To calculate this, we need to know the weight of one cup of bread flour. According to the USDA, one cup of all-purpose flour weighs 4.5 ounces. Bread flour is typically a little denser than all-purpose flour, so we can estimate that one cup of bread flour weighs about 5 ounces.

Now we can divide the total weight of bread flour (25 pounds) by the weight of one cup of bread flour (5 ounces) to find the number of cups in 25 pounds:

$$ 25 \text{ pounds} \times \frac{16 \text{ ounces}}{1 \text{ pound}} \times \frac{1 \text{ cup}}{5 \text{ ounces}} = 20 \text{ cups}$$