Two hollow supheres of thickness are filled with ice The ratio of their diameter is `1:2` and the materials is `2 :3` The ratio of times in which the ice gets melted in the two spheres is .

Two hollow suphers of same material one with double the radius of the other and double the thickness of the other filled with ice, the ratio of time in which ice gets melted in the two spheres is .

If the ratio of the diameters of two spheres is 3 : 5, then what is the ratio of their surface areas ?

Two solid spheres are made of the same material. The ratio of their diameters is 2: 1. The ratio of their moments of inertia about their respective diameters is

If the ratio of the diameters of two spheres is 3:5, then what is the ratio of their surface areas?

Two solid spheres are made up of the same material of density rho . The ratio of their radii is 1 : 2 . The ratio of their moments of inertia about their respective diameters is

Two solid spheres are made up of the same material of density rho . The ratio of their radii is 1 : 2 . The ratio of their moments of inertia about their respective diameters is

The ratio of the weights of two spheres is 8:27 and the ratio of weights per 1 cc of materials of two is 8:1. The ratio of the radii of the spheres is

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.