The surface tension of a soap bubble is 0.03 N / m. The work done in increasing the diameter of bubble from 2 cm to 6 cm is α π × 10^-4 J. The value…

The surface tension of a soap bubble is $\displaystyle 0.03 \mathrm{~N} / \mathrm{m}$. The work done in increasing the diameter of bubble from $\displaystyle 2$ cm to $\displaystyle 6$ cm is $\displaystyle \alpha \pi \times 10^{-4} \mathrm{~J}$. The value of $\displaystyle \alpha$ is $\displaystyle \_\_\_\_$. (Take $\displaystyle \pi=3.14$ )