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One pipe can fill a tank in 8 minutes and the second pipe can fill it in 12 minutes. If the tank is empty, how long will it take both pipes to fill it?
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One pipe can fill a tank in 8 minutes and the second pipe can fill it in 12 minutes. If the tank is empty, how long will it take both pipes to fill it?

User Dbostream
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Answer:

1st pipe 8 min 2nd pipe 12 min

User Isotrope
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