1cm
\(\sqrt{\frac{3\pi}{24}}\)
\(\frac{\pi}{24\sqrt{3}}\)
24\(\sqrt{3}\)
Correct answer is C
The rise of water is equivalent to the volume of the sphere of radius \(\frac{1}{2}\)cm immersed x \(\frac{1}{\text{No. of sides sq. root 3}}\)
Vol. of sphere of radius = 4\(\pi\) x \(\frac{1}{8}\) x \(\frac{1}{3}\) - (\(\frac{1}{2}\))3
= \(\frac{1}{8}\)
= \(\frac{\pi}{6}\) x \(\frac{1}{4\sqrt{3}}\)
= \(\frac{\pi}{24\sqrt{3}}\)