Un bus par de Nantes a 15h50 et arrive a tours a 19h05 après avoir parcouru 221km 1)calculer la durée du trajet en heures et minutes
2)calculer la vitesse moyenne de ce bus

1) 3:15 hours.

2) 68 km per hour.

Step-by-step explanation:

Since a bus from Nantes at 3:50 p.m. and arrives at Tours at 7:05 p.m. after having traveled 221km, to calculate the journey time in hours and minutes and calculate the average speed of this bus, the following calculations must be performed:

1) 7:05 - 3:50 = 3:15

     Thus, the duration of the trip was 3 hours and 15 minutes

2) 0:15 = 0.25

    221 / 3.25 = X

    68 = X

    Thus, the average speed of the bus was 68 km per hour.