Question

un ciclista avanza 12km en 40 minutos su velocidad promedio vale?

Answer 1

   d = 12 Km
   t  = 40 min            40min (1h/60min) = 0,67h
   v = ?                            
                                  v = d/t
                                  v = 12Km/0,67h
                                  v = 18 Km/h