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Obk = 4/3×π×r³ = 4/3×π×3³ = 36πcm³
Objętość stożka:
Obs = 1/3×π×r²×h
Obliczenie h:
Obk = Obs
36π = 1/3×π×4²×h
36π = 16/3×π×h
h=36π÷16/3π = 36×3/16 = 6,75cm
V kuli = 36π
V stożka = 1/3Hπr² |*3
3V = Hπr²
H = 3V:πr²
H = 3*36π:(π*4*4)
H = 108π:16π
H = 6,75