A hollow sphere of glass whose external and interanl radii are 11 cm and 9 cm respectively, is completely filled wihc ice at 0^(0)C is placed in a bath of boiling water (at 100^(0)C). Given, density of ice is 0.9" g cm"^(-3), latent heat of fusion of ice is 80" cal g"^(-1) and thermal conductivity of glass is 0.002 cal "cm"^(-1)"s"^(-1)""^(0)C^(-1). Choose the correct options.

A hollow sphere of glass whose external and interanl radii are 11 cm a

1.	A hollow sphere of glass whose external and interanl radii are 11 cm and 9 cm respectively, is completely filled wihc ice at 0^(0)C is placed in a bath of boiling water (at 100^(0)C). Given, density of ice is 0.9" g cm"^(-3), latent heat of fusion of ice is 80" cal g"^(-1) and thermal conductivity of glass is 0.002 cal "cm"^(-1)"s"^(-1)""^(0)C^(-1). Choose the correct options.
Answer» Rate of melting of ICE is NEARLY `(PI)/(2)gs^(-1)` Rate of melting of ice is nearly `2pi gs^(-1)` time taken by ice to melt completely is nearly 10 MIN time take by ice to melt completely is more than 10 min Answer :A::C