Mathematics
If a solid sphere of radius r is melted and recast into the shape of a solid cone of height r then the radius of the base of the cone is :
r
2r
3r
4r
Related Questions
A sphere of radius 6 cm is dropped into a cylindrical vessel, partly filled with water. The radius of the vessel is 8 cm. If the sphere is submerged completely, then the surface of the water rises by :
2 cm
3 cm
4 cm
4.5 cm
If a cylindrical rod of iron whose length is 12 times its radius is melted and cast into spherical balls of the same radius, then the number of balls will be :
3
6
9
27
If the volume and the surface area of a sphere are numerically the same, then its radius is:
1 unit
2 units
3 units
4 units
The diameter of a copper sphere is 6 cm. The sphere is melted and drawn into a long wire of uniform circular cross section. If the length of the wire is 36 cm, then its radius is :
0.5 cm
1 cm
1.2 cm
1.5 cm