Question

14. A toy is in the form of a cone of radius 3.5 cm mounted on a hemisphere
of same radius on its circular face. The total height of the toy is 15.5 cm.
Find the total surface area of the toy.
[CBSE 2017]​

Answer 1

For hemishere

Radius=3.5cm

Find csa of hemisphere

Now for cone

Radius =3.5cm

Height= Total height-radius

15.5-3.5

12cm

Find slant height=

Ating finding slant height find csa of cone

Csa of cone

Now Tsa of toy= Csa of hemisphere+csa of cone