A soap bubble of radius (1)/( sqrt(pi) cm is expanded to double its radius. If the surface tension is 30 dynes/cm, the work done is

A soap bubble of radius (1)/( sqrt(pi) cm is expanded to double its ra

1.	A soap bubble of radius (1)/( sqrt(pi) cm is expanded to double its radius. If the surface tension is 30 dynes/cm, the work done is
Answer» 700 ERGS 720 ergs 800 ergs 360 ergs. Answer :B