Question

Total surface of a hemisphere. please help i’ll give u brainliest if u help mw

Answer 1

Answer:

602.9 cm²

Step-by-step explanation:

==>Given:

A hemisphere with radius of 8cm

π = 3.14

==>Required:

Total surface area of hemisphere

==>Solution:

The total surface area of the hemisphere (TSA) = Curved surface area of hemisphere (CSA)+ base area (BA)

If surface area of a sphere is given as 4πr², therefore, the area of a hemisphere would be ½ of 4πr² = 2πr²

CSA = 2πr²

Base area (BA) = area of circle = πr²

Thus, TSA = 2πr2 + πr2 = 3πr2

TSA of hemisphere = 3 × 3.14 × 8²

TSA = 3 × 3.14 × 64

TSA = 602.88

TSA of hemisphere = 602.9 cm² (approximated to 1 decimal place)