Two vessels A and B of different materials but having identical shape, size and wall-thickness are filled with ice and kep at the same plane. Ice melts at the rate of `100 g min^(-1)` and `150 g min^(-1)` in A and B respectively. Assuming that heat enters the vessels through the walls only, calculate the ratio of thermal conductivity of their materials.

The vessels A and B made of different materials but having identical shape, size wll thickness are filled with ice and kept at the same place. Ice melts at the rate of "100 g min"^(-1) and "150 g min"^(-1) in A and B respectively. Assuming that heat enters both vessels through the walls only, calculate the ratio of thermal conductivities of their materials.

Two vessels of different materials are identical in size and wall-thickness. They are filled with equal quantities of ice at 0^(@)C . If the ice melts completely in 10 and 25 minutes respectively, compare the coefficients of thermal conductivity of the materials of the vessels.

Two vessels of different materials are identical in size and wall-thickness. They are filled with equal quantities of ice at 0^(@)C . If the ice melts completely in 10 and 25 minutes respectively, compare the coefficients of thermal conductivity of the materials of the vessels.

Two vessels of different materials are identical in size and wall-thickness. They are filled with equal quantities of ice at 0^(@)C . If the ice melts completely in 10 and 25 minutes respectively, compare the coefficients of thermal conductivity of the materials of the vessels.

Two vessels of different materials are identical in size and wall thickness. They are filled with equal quantities of ice at 0°C. The ratio of their thermal conductivities is 5 : 2. If it takes 10 minutess for the ice to melt in the first vessel, then find what time the ice in the vessel takes to melt.

Two vessels 1 and 2, made out of different materials are identical in all the geometrical aspects. In both the vessel the same quantity of ice gets melted in 20 min and 30 min respectively. The ratio of the thermal conductivity of the second one to that of the first is

Two vessels 1 and 2, made out of different materials are identical in all the geometrical aspects. In both the vessel the same quantity of ice gets melted in 20 min and 30 min respectively. The ratio of the thermal conductivity of the second one to that of the first is

Two spheres of different material one with double the radius and one fourth wall thickness of the other are filled with ice. If the time taken for complete melting of ice in the larger radius one is 25 minutes and that for smaller sphere is 16 minutes, the ratio of thermal conductivities of material of larger sphere to smaller sphere is

Two spheres of different materials one with double the radius and one-fourth wall thickness of the other, are filled with ice. If the time taken for complete melting ice in the large radius one is 25 minutes and that for smaller one is 16 minutes, the ratio of thermal conductivities of the materials of larger sphere to the smaller sphere is