Question

Find the total surface area of hemisphere
whose radius is r.​

Answer 1

Answer:

The surface area of a sphere of radius r is 4πr²  

. Half of this is 2πr²

If you have a hemispherical object then it has a base which is a circle of radius r.

The area of a circle of radius r is πr²  

 and thus if the hemisphere is meant to include the base then the surface area is  2πr²+πr²  =3πr²  

Step-by-step explanation:

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Answer 2

Answer:

Total surface area of a solid hemisphere with radius r, is S=2πr+πr2=3πr2

Step-by-step explanation:

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