Question

Find the total surface area of a hemisphere of radius 10cm

Answer 1

radius of hemisphere =10cm

total surface area of hemisphere =

= (3*22/7*10*10)cm square

=6600/7 cm square

=942.85 cm square .

Answer 2

Given :

• Radius of Hemisphere = 10cm

To Find :

• Total Surface Area of Hemisphere

Solution :

$\longrightarrow\tt{Radius(r)=10cm}$

Using Formula :

$\longrightarrow\tt\boxed{T.S.A\:of\:Hemisphere=3\pi{{r}^{2}}}$

Putting Values :

$\longrightarrow\tt{3\times\dfrac{22}{7}\times{10}\times{10}}$

$\longrightarrow\tt{\dfrac{66\times{10}\times{10}}{7}}$

$\longrightarrow\tt{\cancel\dfrac{6600}{7}}$

$\longrightarrow\tt\bold{942.8{cm}^{2}\:(Approx)}$

So , The total surface area of Hemisphere is 942.8cm²...

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• C.S.A of Hemishphere = 2πr²
• T.S.A of Hemisphere = 3πr²
• Volume of Hemisphere = 2/3 πr³

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