debthornton

A tank can be filled by a large intake pipe in 3 hours or by a small intake pipe in 4 hours. If both intake pipes are opened, how long will it take to fill the tank?

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sauravshakya

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1/(1/3+1/4)

sauravshakya

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Simplify it

debthornton

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so, it would be 7/12?

sauravshakya

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12/7

debthornton

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1 5/7 hours?

sauravshakya

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yes

debthornton

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thank you