A) \[\frac{81}{256}\]
B) \[\frac{9}{16}\]
C) \[\frac{3}{4}\]
D) \[\frac{\sqrt{3}}{2}\]
Correct Answer: B
Solution :
[b] \[{{A}_{1}}{{v}_{1}}={{A}_{2}}{{v}_{2}}\] (Equation of continuity) \[\frac{{{v}_{\min }}}{{{v}_{\max }}}=\frac{{{v}_{1}}}{{{v}_{2}}}=\frac{{{A}_{2}}}{{{A}_{1}}}=\frac{{{(4.8)}^{2}}}{{{(6.4)}^{2}}}=\frac{9}{16}\]
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