Question

The total surface area of a hemisphere of radius 10 cm using value of π=3.14 is ___
Please help​

Answer 1

Given :

• Radius of Hemisphere = 10 cm
• Value of π = 3.14

To Find :

• Total Surface Area of Hemisphere .

Solution :

$\longmapsto\tt{Radius=10\:cm}$

Using Formula :

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

Putting Values :

$\longmapsto\tt{3\times\dfrac{314}{1{\not{0}}{\not{0}}}\times{1{\not{0}}}\times{1{\not{0}}}}$

$\longmapsto\tt{3\times{314}}$

$\longmapsto\tt\bf{942\:{cm}^{2}}$

So , The T.S.A of Hemisphere is 942 cm² .

___________________

• C.S.A of Hemisphere = 2πr²
• T.S.A of Hemisphere = 3πr²
• Volume of Hemisphere = 2/3 πr³
• Surface Area of Sphere = 4πr²
• Volume of Sphere = 4/3 πr³

___________________

Answer 2

Given :-

Radius = 10 cm

To Find ;-

TSA

Solution :-

We know that

TSA of hemisphere = 3πr²

TSA = 3 × 3.14 × (10)²

TSA = 3 × 3.14 × 100

TSA = 3 × 314

TSA = 942 cm²