Sprendimas: I2kYx2 - 1
S_son =
π
* r* l
π
* r* l|
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S_son = π* r* l$$S_{son}$$ = $$\pi\cdot r\cdot l$$
* r* l$$S_{son}$$ = $$\pi\cdot r\cdot l$$S_son = l* r* π$$S_{son}$$ = $$l\cdot r\cdot \pi$$
$$S_{son}$$ = $$l\cdot r\cdot \pi$$* r* l|
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* r* l$$S_{son}$$ = $$\pi\cdot r\cdot l$$$$S_{son}$$ = $$l\cdot r\cdot \pi$$