Answer:
We can use the formula:
time = distance ÷ speed
where distance is in kilometers (km) and speed is in kilometers per hour (km/h).
Substituting the given values, we get:
time = 340 km ÷ 12 km/h
time = 28.33 hours (rounded to two decimal places)
Therefore, it takes approximately 28.33 hours for the car to travel a distance of 340 km at an average speed of 12 km/h.