1(xii)
A semi-circular sheet of paper having radius 7 cm is folded to form a right circular cone, as shown in the diagram. The slant height of the cone so formed is:
- (a)3.5 cm
- (b)7 cm
- (c)$7\sqrt{2}$ cm
- (d)14 cm
Show SolutionHide Solution↓
When a semi-circular sheet is folded to form a right circular cone, the radius of the semi-circle becomes the slant height of the cone.
Radius of semi-circular sheet = 7 cm.
∴ Slant height of the cone = 7 cm.
Hence, option 2 is the correct option.