Zamień 1a)25m/s= km/h b)1000m/s km/h 2a)72km/h i 144 km/h == m/s POZDRO;)))

1a [latex]25frac{m}{s} = 25 * frac{frac{1}{1000}km}{frac{1}{3600}h} = 25 * frac{1}{1000}km} * frac{3600}{1}h[/latex]   [latex]25 * frac{1}{10}km} * frac{36}{1h} = 5 * frac{1}{2}km} * 36frac{1}{h} = 5 * 18frac{km}{h} = 90frac{km}{h}[/latex]   1b [latex]1000frac{m}{s} = 1000 * frac{frac{1}{1000}km}{frac{1}{3600}h} = 1000 * frac{1}{1000}km} * frac{3600}{1}h[/latex]   [latex]1000*frac{1}{10}km} * frac{36}{1h} = 100km * 36frac{1}{h} = 3600frac{km}{h}[/latex]   2a [latex]72frac{km}{h} = 72 * frac{1000m}{3600s} = 72 * frac{10}{36}frac{m}{s} = 2 * 10frac{m}{s}=20frac{m}{s}[/latex]   2b [latex]144frac{km}{h} = 144 * frac{1000m}{3600s} = 144 * frac{10}{36}frac{m}{s} = 4 * 10frac{m}{s}=40frac{m}{s}[/latex]

1 km = 1000 m 1 m = 0,001 km 1 h = 3600 s 1 s = 1/3600 h   1. a) 25 m/s = 25*0,001km/(1/3600)s = 90 km/h b) 1000 m/s = 1km/(1/3600)s = 3600 km/h   2. a) 72 km/h = 72*1000m/3600s = 20 m/s b) 144 km/h = 144*1000m/3600s = 40 m/s