Why is the formula for surface area of a sphere [math]4\pi r^2[/math], and why is volume [math]\frac{4}{3}\pi r^3[/math]? - Quora
Why is the formula for surface area of a sphere [math]4\pi r^2[/math], and why is volume [math]\frac{4}{3}\pi r^3[/math]? - Quora
![I=(P)/(4pi r^(2)) At a large distance r from a radio antenna, the intensity of the radio signal I is related to the power of the signal P by the formula above. For I=(P)/(4pi r^(2)) At a large distance r from a radio antenna, the intensity of the radio signal I is related to the power of the signal P by the formula above. For](https://d10lpgp6xz60nq.cloudfront.net/web-thumb/181172304_web.png)
I=(P)/(4pi r^(2)) At a large distance r from a radio antenna, the intensity of the radio signal I is related to the power of the signal P by the formula above. For
Why is the formula for surface area of a sphere [math]4\pi r^2[/math], and why is volume [math]\frac{4}{3}\pi r^3[/math]? - Quora
![calculus - Show that the volume of a sphere of radius $r$ is $V = \frac{4}{3} \pi r^3$ - Mathematics Stack Exchange calculus - Show that the volume of a sphere of radius $r$ is $V = \frac{4}{3} \pi r^3$ - Mathematics Stack Exchange](https://i.stack.imgur.com/YFxe7.png)