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396πcm²=π9cm*l/9πcm
44cm=l
l=44 cm
h²+r²=l²
h²+9²=44²
h²+81=1936
h²=1936-81
h²=1855
h≈43 cm
Odp. Wysokosc stozka wynosi 43 cm.
396πcm²=π×9l /:π
9 l=396
l=396:9
l=44cm= tworząca stozka
h stożka oblicz z pitagorasa
h²=l²-r²
h²=44²-9²
h²=1936-81
h²=1855
h=√1855cm