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1. A tap can fill a tank in $5 \frac{1}{2}$ hours. Because of a leak, it took $8 \frac{1}{4}$ hours to fill the tank. In how much time (in hours) will the leak alone empty 30% of the tank?

A. $\frac{17}{2}$

B. $\frac{99}{20}$

C. $\frac{5}{2}$

D. $\frac{9}{2}$

No explanation ¯\_(ツ)_/¯

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