T = \frac{2.5}{500} = 0.005 min = 0.3 s\\ 2) V = \frac{2\pi R}{T};\\=> V = \frac{\pi d}{T} = \frac{\pi \cdot 1.8}{0.3} = 18.84 m/s" alt="1) T = \frac{t}{N}\\ => T = \frac{2.5}{500} = 0.005 min = 0.3 s\\ 2) V = \frac{2\pi R}{T};\\=> V = \frac{\pi d}{T} = \frac{\pi \cdot 1.8}{0.3} = 18.84 m/s" align="absmiddle" class="latex-formula">