How many inches are in 28 mm?

To determine how many inches are in 28 mm, one must first understand the conversion factor between millimeters and inches. There are 25.4 millimeters in one inch. To convert millimeters to inches, you divide the number of millimeters by 25.4.

Carrying out the calculation:

28 mm ÷ 25.4 mm/inch = 1.10236 inches.

Rounding this to a reasonable degree of precision, you can approximate the result to 1.1 inches. This demonstrates that the correct conversion method leads to the result that closely aligns with the given choice.

This context clarifies why the response indicating 1.1 inches is appropriate based on the established conversion ratio between millimeters and inches.