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

diameter of capillary, $D= 1.25 \times 10^{-2}\; m$

rise of water, $h=1.45 \times 10^{-2}\; m $ 

Using $g= 9.80 \;m/s^2$ and the simplified relation $T = \frac{{rhg}}{2}\times 10^3 N/m$ , the possible error in surface tension is ........... $\%$

  • [JEE MAIN 2017]
  • A

    $0.15 $

  • B

    $1.5$

  • C

    $2.4$

  • D

    $10$

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  • [IIT 2010]

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