The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly: (surface tension of soap solution =0.03 N m^-1 )

The amount of energy required to form a soap bubble of radius $\displaystyle 2$ cm from a soap solution is nearly : (surface tension of soap solution $\displaystyle =0.03 \mathrm{~N} \mathrm{~m}^{-1}$ )