oblicz pole powierzchni całkowitej walca wiedząc że wysokość jest dwa razy większa niż d r=2 cm .
Dane :
r= 2 cm
d = 2*r
d = 2 * 2 = 4 cm
H= 2*d
H = 2 * 4 = 8 cm
P = 2πr² + 2πrH
P = 2 π * 2² + 2 π * 2 * 8 = 8π + 32π = 40 π cm
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Dane :
r= 2 cm
d = 2*r
d = 2 * 2 = 4 cm
H= 2*d
H = 2 * 4 = 8 cm
P = 2πr² + 2πrH
P = 2 π * 2² + 2 π * 2 * 8 = 8π + 32π = 40 π cm