Beach Day by Rodger Bliss
January 2023
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Pipes O’ Plenty

A large fresh water reservoir has two types of drainage system: Small pipes and large pipes.

Six large pipes can drain the reservoir in 12 hours. Six small pipes–on their own– can drain the reservoir in 18 hours.

How long will six large pipes and six small pipes take to drain the reservoir?

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1 guess to Pipes O’ Plenty


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  • anant

    7 Hours and 12 minutes