Question

find the surface area of the figure in which a cone of radius 3 cm and slant height of 4 cm is surmounted by a hemisphere of radius 3 centimetre​

Answer 1

Answer:

Surface area of the cone=C.S.A of a cone +C.S.A of hemisphere

Step-by-step explanation:

C.S.A of a cone = pi r l , Where radius =3 cm, slant height = 4cm CSA = 3.14*3*4=37.68cmsq Now CSA of ahemisphere=2 pi r sq Where r=3cm CSA=2*3.14*3*3=56.52cmsq CSA of a cone =56.52+37.68=94.2cmsq Area of the cone =94.2cmsq