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Pp/Pb=8/17
8Pb=17Pp
l=r+9
8πrl=17πr² /:π
8r·(r+9)=17r²
8r²+72r=17r²
72r=17r²-8r²
72r=9r² /:9r
8=r --->promien stozka
to tworzca l=8+9=17cm
z pitagorasa
8²+h²=17²
64+h²=289
h²=289-64
h²=225
h=√225=15 cm --->wysokosc stozka
objetosc stozka
V=1/3Pp·h=1/3π·8²·15=64·5π=320π [ j³ ]