Question

why surface area of sphere is 4pi r2

Answer 1

☞heya mate☜


⚫ 4πr² - surface area of sphere



☃️ hope this helps uh ☃️

Answer 2

The volume of the solid sphere of radius R is then ∫ 0 R 4 π r 2 d r = 4 3 π R 3 . Because the volume of a sphere is the integral of its surface area. The integral of a function is equal to (n/n+1)x^n+1. This is also the reason why the circumference of a circle is 2*pi*r and the area is pi*r^2.