A semi circular sheet of a paper of diameter 28 cm is bent to cover the exterior surface of an open conical ice cream cup. The length of the ice cream cup is:

A) 10.12 cm

B) 8.0 cm

C) 12.0 cm

D) 14.0 cm


Option D


Radius of the semi circular sheet = height of the cone

Therefore height = $\frac{28}{2}=14 cm$