Dane sa trzy kule o promieniach: 4 cm, 3 cm i 5 cm. Oblicz pole powierzchni kuli, jezeli objetosc rowna jest sumie objetosci danych kul.
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Dane :
Kula pierwsza : r= 3 cm
Kula druga : r = 4 cm
Kula trzecia : r = 5 cm
V₁ = 4/3 πr³ = 4/3 π 3³ = 4/3 * 27 π= 36 π
V₂ = 4/3 πr³ = 4/3 π 4³ = 4/3 * 64 π= 256/3 π
V₃= 4/3 πr³ = 4/3 π 5³ = 4/3 * 125 π= 500/3 π
V₁ ₊ ₂ ₊ ₃ = 36 π + 256/3 π + 500/3 π = 36 π + 756/3 π= 36π + 252π = 288π
V = 4/3 πr³
288π = 4/3 πr³
4/3 r³ = 288 / * ¾
r³ = 864/4
r³ = 216
r = ³Ѵ216
r = 6 cm
P = 4 πr² = 4 * 6² π = 4*36 π = 144π cm² = 144 *3,14 = 452,16 cm2
Proszę ;**