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Two capillary tubes of same radius r but...

Two capillary tubes of same radius `r` but of lengths `l_(1)` and `l_(2)` are fitted in parallel to the bottom of a vessel. The pressure to the bottom of a vessel. The pressure head is P. What should be the length of a single tube of same radius that can replace the two tubes so that the rate of flow is same as before?

A

`l_(1) + l_(2)`

B

`(1)/(l_(1)) + (1)/(l_(2))`

C

`(l_(1)l_(2))/(l_(1) + l_(2))`

D

`(1)/(l_(1) + l_(2))`

Text Solution

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The correct Answer is:
C
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