Расчет: SFkr1V - 1
S =
π
* r* (r+l)
π
* r* (r+l)|
|
S = π* r* (r+l)$$S$$ = $$\pi\cdot r\cdot (r+l)$$
* r* (r+l)$$S$$ = $$\pi\cdot r\cdot (r+l)$$S = r^2* π+ l* r* π$$S$$ = $$r^{2}\cdot \pi+l\cdot r\cdot \pi$$
+ l* r* π$$S$$ = $$r^{2}\cdot \pi+l\cdot r\cdot \pi$$