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Water enters a cylindrical tank of radius 2 m at 8 pi m^3/min. How fast does the level rise?
A2 m/min
B1 m/min
C4 m/min
D8 m/min
Answer & Solution
Correct answer: A. 2 m/min
V = 4 pi h gives dh/dt = (8 pi)/(4 pi) = 2 m/min, independent of the current height.
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