Two soap bubbles having radii 3 cm and 4 cm in vacuum, coalesce under isothermal conditions. The radius of the new bubble is

Two spherical soap bubbles of a radii 1 cm and 2 cm vacuum coalesce under isothermal conditions . The resultant bubble has a radius of

Two spherical soap bubbles of radii a and b in vacuum coalesce under isothermal conditions. The resulting bubble has a radius given by

Two spherical soap bubbles of radii a and b in vacuum coalesce under isothermal conditions. The resulting bubble has a radius given by

Two spherical soap bubbles of radii a and b in vacuum coalesce under isothermal condition. The resulting bubbles has a radius given by …..

Two spherical soap bubbles of radii r_1 and r_2 in vacuume coalesce under isothermal condition. The resulting bubble has radius R such that

Two spherical soap bubbles of radii r_1 and r_2 in vacuume coalesce under isothermal condition. The resulting bubble has radius R such that

Two spherical soap bubbles of radii r_(1) and r_(2) in vaccum coalesce under isothermal conditions. The resulting bubble has a radius R such that