Question
Japheth can paint a storeroom in 12 hours. Andy can paint the same storeroom in 6 hours. How long will it take for both of them to paint the same storeroom together?
2 m

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Japheth can paint a storeroom in 12 hours. Andy can paint the same storeroom in 6 hours. How long will it take for both of them to paint the same storeroom together?