Answer:
Explanation:
A: V = πr²h
B: V = 1/3π(2r)²(2h) = 1/3π(4r²)(2h) = 1/3π8r²h = 8/3πr²h
C: V = π(2r)²(2h) = π(4r²)(2h) = π8r²h = 8πr²h
D: V = 1/3πr²(2h) = 2/3πr²h
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