- A12
- B15
- C9
- D18
Step-by-Step Solution
In 6 min both fill 6/18 + 6/27 = 1/3 + 2/9 = 5/9. The remaining 4/9 is filled by Y at 1/27 per min: min.
Answer: A) 12
Taps X and Y can fill a tank in 18 minutes and 27 minutes respectively. Both are turned on, and after 6 minutes X is turned off. How many more minutes does Y need to finish filling the tank?
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