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A physics question about fluid dynamics ?

I've already solved the problem but i would like to check my answer '11.15 min' .

Here is the question :

"a hospital patient receive a quick blood transfusion through a needle with a length of 5 cm and an inner diameter of 1 mm . If the blood bag is suspended 0.85 m above the needle , how long does the transfusion take ? (neglect the viscosity of the blood flowing in the plastic tube between the bag and the needle) "

plz tell me which equations did u use through out ur answer .

And thanks alot .

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