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30=6h
h=5
V= 1/3 π r² * h
V= 1/3 π * 9 * 5
V=15π
π≈3,14
V=47,1 cm³
P = 15cm²
P = 1/2ah
P = 1/2*6h
3h = 15 |:3
h = 5
r = a/2 = 6/2 = 3cm
V = 1/3πr²H
V = 1/3*π*3²*5
V = 1/3*9*5π
V = 3*5π
V = 15π cm³