2 spheres of same metal weigh 1 kg and 7 kg. The radius of smaller sphere is 3 cm. The 2 spheres are melted to form a big sphere. Find diameter of new sphere.
Question 2 Metallic spheres of radii 6 cm, 8 cm and 10 cm, respectively, are melted to form a single solid sphere. Find the radius of the resulting sphere.