[tex]dane:\\v = 3600\frac{m}{s}\\f = 1700 \ Hz = 1700 \frac{1}{s}\\szukane:\\\lambda = ?\\\\Rozwiazanie\\\\\lambda = v\cdot T\\\\T = \frac{1}{f}, \ zatem\\\\\lambda = \frac{v}{f}\\\\\lambda = \frac{3600\frac{m}{s}}{1700 \frac{1}{s}}\approx2,12 \ m[/tex]