Odpowiedź :
[tex]Dane:\\n = 240\\t = 2 \ min = 2\cdot60 \ s = 120 \ s\\Szukane:\\T = ?\\\\\\T = \frac{t}{n}\\\\T = \frac{120 \ s}{240}\\\\\boxed{T = 0,5 \ s}\\\\\underline{Odp. \ A.}[/tex]
[tex]Dane:\\n = 240\\t = 2 \ min = 2\cdot60 \ s = 120 \ s\\Szukane:\\T = ?\\\\\\T = \frac{t}{n}\\\\T = \frac{120 \ s}{240}\\\\\boxed{T = 0,5 \ s}\\\\\underline{Odp. \ A.}[/tex]