1.
| One pipe can empty a tank 5.5 times faster than another pipe can fill the tank. Starting with a full tank, if both pipes are turned on, it takes 16.5 hours to empty the tank. How long does it take the faster pipe working alone to empty a full tank? hours
| 2.
| One pipe can empty a tank 1.5 times faster than another pipe. Starting with a full tank, if both pipes are turned on, it takes 6 hours to empty the tank. How long does it take the faster pipe working alone to empty a full tank? hours
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