If the angular velocity of earth's spin is increased such that the bodies at the equator start floating, the duration of the day would be…

If the angular velocity of earth's spin is increased such that the bodies at the equator start floating, the duration of the day would be approximately : [Take $\displaystyle \mathrm{g}=10 \mathrm{~ms}^{-2}$, the radius of earth, $\displaystyle \mathrm{R}=6400 \times 10^3 \mathrm{~m}$, Take $\displaystyle \pi=3.14$ ]