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Mathematics, 23.10.2019 01:00 laush

It takes 4h for faucet a to fill a tank, and it takes faucet b 6h. how many hours will it take the two faucets to fill the tank together?

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It takes 4h for faucet a to fill a tank, and it takes faucet b 6h. how many hours will it take the t...

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