Two cylindrical vessels of equal cross-sectional area \( 16 \, \text{cm}^{2} \) contain water upto heights \( 100 \, \text{cm} \) and \( 150 \, \text{cm} \) respectively. The vessels are interconnected so that the water levels in them become equal. The work done by the force of gravity during the process, is [Take, density of water \( = 10^{3} \, \text{kg/m}^{3} \) and \( g = 10 \, \text{m s}^{-2} \) ]:
