Answer:
The volume of the cup is of 251 cubic centimeters.
Explanation:
The volume of a cone is given by the following equation:

In which h is the height and r is the radius(half the diameter).
In this question:
Diameter of 8 cm, so

Height of 15 c, so

The dimensions are in centimeters, so the volume will be in cubic centimeters.
Volume:

Rounding to the nearest whole cubic centimeter.
The volume of the cup is of 251 cubic centimeters.