[latex]a) v= frac{s}{t} = frac{6,5km}{16min} = frac{6500m}{960s} approx 6,77 frac{m}{s}\\ b) v= frac{s}{t} = frac{500m}{1,51min} = frac{500m}{90,6s} approx 5,52 frac{m}{s}\\ c) v= frac{s}{t} = frac{3km}{7min 17s} = frac{3000m}{437s} approx 6,86 frac{m}{s} [/latex]
V=s/t [km/h] a) 16 min = 16/60=4/15 h V=6,5*15/4=(65*15)/(10*4)=975/40=24.375 [km/h] b) 500 m = ½ km 1.51 min = 151/100 min = 151/6 000 h V=(1/2) / (151/6000) = ½*(6000/151) = 3000/151 ≈ 19,868 [km/h] c) 7min17s = 437/60 min = 437/3600 h V=3 / (437/3600) = 3* (3600/437) = 10800/437 ≈ 24,714 [km/h]
