8
Answer: ASet 2: Area Volume (Advanced)
Explanation
PROBLEM
Recent studies show that a cone has radius 2 and height 9. What is its volume? (Express as a number times pi)
A cone has radius 2 and height 9. What is its volume? (Express as a number times pi)
A.✓ Correct
12pi
B.
24pi
C.
36pi
D.
18pi
Detailed Explanation
[Variation 1] Choice A is the best answer. Volume = (1/3) times pi times r squared times h = (1/3) times pi times 4 times 9 = 12pi
Why others are wrong:
B: 24pi is incorrect because it does not satisfy the equation.
C: 36pi is incorrect because it does not satisfy the equation.
D: 18pi is incorrect because it does not satisfy the equation.