Question

Find the surface area of sphere whose diameter is 3.4m​

Answer 1

Given :

• Diameter of Sphere is 3.4 m .

To Find :

• Surface Area of Sphere .

Solution :

$\longmapsto\tt{Radius=\dfrac{3.4}{2}}$

Using Formula :

$\longmapsto\tt\boxed{Surface\:Area\:of\:Sphere=4\pi{{r}^{2}}}$

Putting Values :

$\longmapsto\tt{{\not{4}}\times\dfrac{22}{7}\times\dfrac{34}{{\not{2}}\times{10}}\times\dfrac{34}{{\not{2}}\times{10}}}$

$\longmapsto\tt{\dfrac{22\times{34}\times{34}}{7\times{10}\times{10}}}$

$\longmapsto\tt{\cancel\dfrac{25432}{700}}$

$\longmapsto\tt\bf{36.2\:{m}^{2}}$

So , The Surface Area of Sphere is 36.2 m² ..

_______________________

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

_______________________

Answer 2

Answer:

Surface area of sphere= A =

$4\pi \: r {}^{2}$

Diameter = 3.4m

Radius =3.4/2 = 1.7m

A = 4 pi (1.7)²

= 4 × 3.14 × 2.89

= 36.2984 m²