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r=6
l - trorzaca stożka
r = 6cm
V = 1/3 πr²*h = 1/3 * π*36*8 = 96πcm³
Pc = πr(r+l)
l - tworzacą policzysz z Tw Pitagorasa
l²= h²+r²
l²= 64+36 = 100 cm
Pc = 6π(6+10) = 6π*16 = 96πcm²