Odpowiedzi

2009-11-03T20:18:44+01:00
V = ωr
ω = const

ω = 2π/T

2πr/T = 2,5*2π(r+5)/T
2πr/T = 5π(r+5)/T
2r = 5r+25
3r = 25
r = 8¹/₃ cm
4 2 4