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OpenStudy (anonymous):
A tap can fill a tank in 6 hours and another can empty it in 8 hours. In how many hours the tank will be full if both are open?
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OpenStudy (anonymous):
I thought we did this once?
OpenStudy (anonymous):
A sixth less an eighth per hour
OpenStudy (anonymous):
1/6 - 1/8 = 1/24 24 hours.
OpenStudy (anonymous):
oh yeh that's it thenx
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