A tank can be filled by two taps X and Y in 18 and 30 minutes respectively. If tap X stops working when the tank is half-full, then what is the total time that the tank will take to fill?

A tank can be filled by two taps X and Y in 18 and 30 minutes respecti

1.	A tank can be filled by two taps X and Y in 18 and 30 minutes respectively. If tap X stops working when the tank is half-full, then what is the total time that the tank will take to fill?
A.	\(20\frac{5}{8}\)
B.	\(11\frac{1}{4}\)
C.	\(16\frac{1}{4}\)
D.	\(5\frac{5}{8}\)
Answer» B. \(11\frac{1}{4}\)

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A tank can be filled by two taps X and Y in 18 and 30 minutes respectively. If tap X stops working when the tank is half-full, then what is the total time that the tank will take to fill?

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