The diameter of the base of a cylinder is twice the radius. If the radius is not provided in the question, I am unable to determine the diameter directly. However, if you are given options like 2, 4, or 15, you can identify the diameter based on what you know about the radius.
- If the radius is 1, the diameter is 2.
- If the radius is 2, the diameter is 4.
- If the radius is 7.5, the diameter is 15.
Please refer to the specific diagram or information you have to identify the correct radius, then apply the formula \( \text{Diameter} = 2 \times \text{Radius} \).
If you provide the radius or further details, I can help determine the correct diameter of the base of the cylinder.