Answer:
It's asking for you to calculate the volume of a cylinder and multiply it by 2/3. This is because the question is asking how much water is in a cylindrical vase with the height and radius.
The formula to calculate the volume of a cylinder is : 3.14 (r^2) (h)
R being the radius and H being the height.
Plug in the values then multiply it all by 2/3
Hoped this help you solve your problem.