Error in surface tension

The following observations were taken for determining surface tension $$T$$ of water by capillary method.

In this method, we dip a thin tube (called capillary) of diameter $$D = 1.25 \times 10^{-2} m$$ in water and water rises on its own in the capillary to a height $$h= 1.45 \times 10^{-2} m$$.

The possible error in surface tension is closest to:

Details and assumptions:

• $$g = 9.80$$ $$\text{m/s}$$ $$^2$$
• Simplified relation, $$T = \dfrac{rhg}{2} \times 10^3 N/m$$, where $$r$$ is the radius of the capillary.
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