Which of the following statements about volume and/or capacity is not true?

a. Capacity can be measured in litres. b. Volume is measured in cubed units.

c. Solid objects always have volume and capacity. d. Volume is the amount of three-dimensional space occupied by an object.

c. Solid objects always have volume and capacity.

This statement is not true. While all solid objects have volume, not all solid objects have capacity. Capacity refers to the maximum amount of fluid or substance that can be held by an object or container. Solid objects do not have the ability to hold fluid or substance, so they do not have capacity.