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Practicing Success
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Pipes A and B can fill a tank in 40 hours and 50 hours respectively and pipe C can empty the full tank in 60 hours. If all the pipes are opened together, how much time (in hours ) will be needed to fill the tank ? |
$33\frac{5}{17}$ $35\frac{5}{17}$ $31\frac{5}{17}$ $30\frac{5}{17}$ |
$35\frac{5}{17}$ |
