7
Answer: BSet 3: Area Volume (Advanced)
Explanation
PROBLEM
Recent studies show that a cone has radius 4 and height 12. What is its volume? (Express as a number times pi)
A cone has radius 4 and height 12. What is its volume? (Express as a number times pi)
A.
128pi
B.✓ Correct
64pi
C.
192pi
D.
48pi
Detailed Explanation
[Variation 1] Choice B is the best answer. Volume = (1/3) times pi times r squared times h = (1/3) times pi times 16 times 12 = 64pi
Why others are wrong:
A: 128pi is incorrect because it does not satisfy the equation.
C: 192pi is incorrect because it does not satisfy the equation.
D: 48pi is incorrect because it does not satisfy the equation.