Mathematics
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
Related Questions
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
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
A spherical ball of radius 3 cm is melted and recast into three spherical balls. The radii of two of these balls are 1.5 cm and 2 cm. The radius of the third ball is :
0.5 cm
1 cm
1.5 cm
2.5 cm
A sphere of diameter 12.6 cm is melted and cast into a right circular cone of height 25.2 cm. The radius of the base of the cone is :
2 cm
2.1 cm
3 cm
6.3 cm