How Long to Empty Half the Water in a Vessel?

[roshan2004]

Homework Statement

A vessel of cross section 20 cm2 has at the bottom a horizontal capillary tube of length 10 cm and internal diameter 0.5 mm. It is initially filled with water to a height of 50 cm. Find the time taken to empty one half of the content in the vessel. Viscosity of water is 0.01 kgm-1s-1

Homework Equations

Poiseuille Equation

The Attempt at a Solution

 

[tiny-tim]

hi roshan2004!

show us what you've tried, and where you're stuck, and then we'll know how to help!