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

Two capillary tubes of same radiusr but of lengths, l_(1) and l_(2) ar

1.	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
Answer» `l_(1)+l_(2)` `(1)/(l_(1))+(1)/(l_(2))` `(l_(1)l_(2))/(l_(1)+l_(2))` `(L)/(l_(1)+l_(2))` ANSWER :C