PhysicsEasy148×since 2002Q8020A water drop of radius 1 cm1 \mathrm{~cm}1 cm is broken into 729 equal droplets. If surface tension of water is 75 dyne/ cm\mathrm{cm}cm, then the gain in surface energy upto first decimal place will be : (Given π=3.14\pi=3.14π=3.14 )A8.5×10−4 J8.5 \times 10^{-4} \mathrm{~J}8.5×10−4 JB8.2×10−4 J8.2 \times 10^{-4} \mathrm{~J}8.2×10−4 JC7.5×10−4 J7.5 \times 10^{-4} \mathrm{~J}7.5×10−4 JD5.3×10−4 J5.3 \times 10^{-4} \mathrm{~J}5.3×10−4 JCheck answerSkip