Final answer:
The volume of a right rectangular prism is calculated using the formula V = length × width × height. In this instance, the volume is 240 cm³.
Step-by-step explanation:
To find the volume of a right rectangular prism, you use the formula V = length × width × height. For this problem, the base dimensions are given as 3 cm by 8 cm, and the height is 10 cm. Therefore, the calculation of the volume would be:
V = 3 cm × 8 cm × 10 cm = 240 cm³.
Thus, the correct answer is A. 240 cm³.