Question

If the radius of a solid hemisphere is 5 cm, then find its curved surface area and total surface area, (π = 3.14)

Answer 1

Given: Radius (r) = 5 cm 

To find: Curved surface area and total surface area of hemisphere 

i. Curved surface area of hemisphere = 2πr² 

= 2 x 3.14 x 5² 

= 2 x 3.14 x 25 

= 50 x 3.14 

= 157 sq.cm.

ii. Total surface area of hemisphere = 3πr² 

= 3 x 3.14 x 5² 

= 235.5 sq.cm. 

∴ The curved surface area and total surface area of hemisphere are 157 sq.cm, and 235.5 sq.cm, respectively.