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Two capillary tubes of same radiusr but ...

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

A

`l_(1)+l_(2)`

B

`sqrt(l_(1)l_(2))`

C

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

D

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

Text Solution

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The correct Answer is:
C
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