A hollow sphere of inner radius a and outer radius 2a is made of a material of thermal conductivity K. It is surrouunded by another hollow sphere of inner radius 2a and outside radius 3a made of same material of thermal conductivity K. The inside of smaller sphere is maintained at 0^(0)C and the outside of bigger sphere at 100^(0)C. The system is in steady state. The temperature of the interface is 25xx x. Then x is equal to ....................

A hollow sphere of inner radius a and outer radius 2a is made of a mat

1.	A hollow sphere of inner radius a and outer radius 2a is made of a material of thermal conductivity K. It is surrouunded by another hollow sphere of inner radius 2a and outside radius 3a made of same material of thermal conductivity K. The inside of smaller sphere is maintained at 0^(0)C and the outside of bigger sphere at 100^(0)C. The system is in steady state. The temperature of the interface is 25xx x. Then x is equal to ....................
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