A bomb of mass 3m is kept inside a closed box of mass 3m and length 4L at it's center. It explodes in two parts of mass m and 2m. The two parts move in opposite directions and stick to the opposite sides of the walls of box. The box is kept on a smooth horizontal surface. What is the distance moved by the box during this time interval ?
![1144034_0ac2d5ccaf2944d9935b139395bd9f95.png](https://search-static.byjusweb.com/question-images/toppr_invalid/questions/1144034_0ac2d5ccaf2944d9935b139395bd9f95.png)