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V=10 m\s
t=6,28 s
-----------------
r=?
V=2πr/t
V=2πr/t | *t
V*t=2πr |:(2π)
r=V*t/2π
r=10 m\s*6,28 s /2π
r=62,8/2*3,14(wartość liczby pi)
r=62,8/6,28
r=10 m
odp.Promień ronda ,po którym jechał samochód wynosi 10 m.