Resposta:

1: 250 metros, 90km/h ÷3,6 = 25m/s 25m/s × 10 = 250

2: 4 horas, 20m/s × 3,6 = 72km/h 288km ÷ 72km/h = 4h

3: 324km, 30m/s × 3,6 = 108km/h 108km/h × 3 = 324km

4: 30m/s, 900m ÷ 30s = 30m/s