Calculation: A8BHrH - 1
S =
2* π
* R* h
2* π
* R* h|
|
S = 2* π* R* h$$S$$ = $$2\cdot \pi\cdot R\cdot h$$
* R* h$$S$$ = $$2\cdot \pi\cdot R\cdot h$$S = 2* R* h* π$$S$$ = $$2\cdot R\cdot h\cdot \pi$$
$$S$$ = $$2\cdot R\cdot h\cdot \pi$$