An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The maximum and mini...

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An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The maximum and minimum diameters of the pipes are \( 6.4 \mathrm{~cm} \) and \( 4.8 \mathrm{~cm} \), respectively. The ratio of the minimum and the maximum velocities of fluid in this pipe is
(a) \( \frac{9}{16} \)
(b) \( \frac{81}{256} \)
(c) \( \frac{\sqrt{3}}{2} \)
(d) \( \frac{3}{4} \)
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