Question

1. A cone of radius and vertical height h is mounted over a hemisphere of radius r. What is the total surface area of the newly formed solid?​

Answer 1

Step-by-step explanation:

The combined solid is represented in above fig.

TSA of new solid = CSA of Cone + CSA of cylinder + Base area of cylinder

TSA of solid =πrl+2πrh+πr

2

TSA of solid =πr(l+2h+r)

TSA of solid =πr(

r

2

+h

2

+2h+r)