Air is pushed into a soap bubble of radius r to double its radius. If the surface tension of the soap solution is S, the work done in the process is

Air is pushed into a soap bubble of radius r to double its radius. If

1.	Air is pushed into a soap bubble of radius r to double its radius. If the surface tension of the soap solution is S, the work done in the process is
Answer» `8pir^(2)S` `12pir^(2)S` `16pir^(2)S` `24pir^(2)S` ANSWER :D