Question

find the volume of a solid hemisphere whose radius is 3cm​

Answer 1

Answer:

18πcm³ or 56.57cm³(Approximately ) is the Volume of Hemisphere whose radius is 3cm​.

SOLUTION

It is given in the question that the radius of a solid hemisphere = 3cm.

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We know the formula of volume of hemisphere .

$\boxed {\sf Volume\: of \: hemisphere = \dfrac{2}{3} * \pi * r^3}$

Putting value of  r = 3cm .

$\sf Volume = \dfrac{2}{3} *\pi * 3^3$

$\sf Volume = \dfrac{2}{3} *\pi* 27$

$\bigstar$ 27 divided by 3 gives 9

$\sf Volume = 2 * 9 * \pi$

$\sf Volume = 18 \pi cm^3$

Now , If we want we cant substitute π = 22/7 , then

$\sf Volume = 18 * \dfrac{22}{7}$

$\sf Volume = \dfrac{396}{7}$

$\red\bigstar$ Volume = 56.57cm³ (Approximately)

♢Formulas of Surface Area of Hemisphere

Curved Surface Area ( CSA ) = 2πr²

Total  Surface Area ( TSA ) = 3πr²

♢VOLUMES OF FIVE MORE SHAPES♢

$\bigstar$ Cuboid

Volume =  l × b × h

$\bigstar$ Cube

Volume =  a³

$\bigstar$ Cylinder

Volume = π×r²×h

$\bigstar$Cone

$\sf Volume = \pi r^2 * \dfrac{h}{3}$

$\bigstar$ Sphere

$\sf Volume = \dfrac{4}{3} \pi r^3$

Answer 2

Answer:

Step-by-step explanation: