You can calculate it from the formula for velocity v=[tex] \frac{s}{t} [/tex] if it travels 450 yards in 15 seconds s=450 yards t= 15s 1 yard = 3 feet so s= 1350 feet v=[tex] \frac{1350}{15}=90 \frac{feet}{s} [/tex] so if in one second it travels 90 feet, in [tex] \frac{1}{3} [/tex] of a second it travels [tex] \frac{90}{3} =30[/tex] feet
