Question

What is meant by hollow hemisphere mounted on a hollow cylinder???

Answer 1

here the question is from geometry we need to consider the first case ( r=R )

Answer 2

Step-by-step explanation:

Radius=7cm

Height of the cylindrical portion13−7=6cm.

Area of a Curved surface of cylindrical portion is,

=2πrh

=2×

7

22

×7×6

=264cm

2

Area of a curved of hemispherical portion is

=2πr

2

=2×

7

22

×7×7

=308cm

2

∴ total surface area is =308+264=572cm

2

.