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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. \(11\frac{1}{4}\) | |