Hello!
The equation to find the volume of a cone is

r is radius
h is height
Put in the values we know

Square the number

multiply 81 by 3.14

Multiply
339.12
The answer is 339.1 cubic inches
Hope this helps!
4 multiplied by 3.99 will = your answer....Please mark brainliest...
Lemme think real quick...
Answer:
36 ft^3
Step-by-step explanation:
3ft x 2ft = 6ft
6ft x 6ft = 36 ft^3