Final answer:
The volume of a cone is calculated using the formula 1/3πr²h.
Step-by-step explanation:
The correct formula for finding the volume of a cone is option b) 1/3πr²h.
To find the volume of a cone, you need to multiply the area of the base (which is πr²) by the height (h) and then divide the result by 3.
So the formula becomes V = 1/3πr²h.
In this case, the correct answer is option b) 1/3πr²h.