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There capillaries of length l, 2l and l/...

There capillaries of length l, `2l` and `l//2` are connected in series. Their radii are r, `r//2` and `r//3` respectively. If stream line flow is maintained and the pressure difference across the first capillary tube is `P_(1)`, find the pressure difference across (i) the second and (ii) the thired capillary tube.

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The correct Answer is:
`32p_(1),40.5p_(1)`
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