Odpowiedzi

2010-03-12T20:03:57+01:00
O=2πr

O₁=2*3,14*12cm = 75,36cm
O₂=2*3,14*9cm = 56,52cm

O₁/O₂=75,36cm/56,52cm = 1⅓

1⅓*24h = 32