Question

please solve this question​

Answer 1

Answer:

surface area of a sphere is 4πr^2

Step-by-step explanation:

hope it's helpful

Answer 2

Question

what is the surface area of sphere (radius=r)

Given

Radius =r

To Find

Surface area of sphere

$\sf\huge\bold{\underline{\underline{{Solution}}}}$

Surface area of sphere with radius r =4πr²units

Surface area of sphere is the total area /space occupied by the sphere in its outer surface in its 3D ( three dimensional )

Lets understand with example

Find the surface area of a ball which is in the shape of a sphere having a radius of 7cm.

Answer: Given radius =7cm

Now , apply formula

Surface area of Sphere=4πr²

=>4×22/7×7×7

=>88×7

=>616cm²

Extra information=>

The total surface area of area =lateral surface area of sphere .

Area of sphere is similar to the area of Circle which is πr² but it is 3 dimensional figure /shape that's why it's area is 4πr²